linaro-kernel

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10094 discussions

[PATCH] [RFC] Support for creating generic host_bridge from device tree

by Liviu Dudau

Following the discussion started here [1], I now have a proposal for tackling generic support for host bridges described via device tree. It is an initial stab at it, to try to get feedback and suggestions, but it is functional enough that I have PCI Express for arm64 working on an FPGA using the patch that I am also publishing that adds support for PCI for that platform. Looking at the existing architectures that fit the requirements (use of device tree and PCI) yields the powerpc and microblaze as generic enough to make them candidates for conversion. I have a tentative patch for microblaze that I can only compile test it, unfortunately using qemu-microblaze leads to an early crash in the kernel. As Bjorn has mentioned in the previous discussion, the idea is to add to struct pci_host_bridge enough data to be able to reduce the size or remove the architecture specific pci_controller structure. arm64 support actually manages to get rid of all the architecture static data and has no pci_controller structure defined. For host bridge drivers that means a change of API unless architectures decide to provide a compatibility layer (comments here please). In order to initialise a host bridge with the new API, the following example code is sufficient for a _probe() function: static int myhostbridge_probe(struct platform_device *pdev) { int err; struct device_node *dev; struct pci_host_bridge *bridge; struct resource bus_range; struct myhostbridge_port *pp; LIST_HEAD(resources); dev = pdev->dev.of_node; if (!of_device_is_available(dev)) { pr_warn("%s: disabled\n", dev->full_name); return -ENODEV; } pp = kzalloc(sizeof(struct myhostbridge_port), GFP_KERNEL); if (!pp) return -ENOMEM; err = of_pci_parse_bus_range(dev, &bus_range); if (err) { bus_range.start = 0; bus_range.end = 255; bus_range.flags = IORESOURCE_BUS; } pci_add_resource(&resources, &bus_range); bridge = pci_host_bridge_of_init(&pdev->dev, 0, &myhostbridge_ops, pp, &resources); if (!bridge) { err = -EINVAL; goto bridge_init_fail; } err = myhostbridge_setup(bridge->bus); if (err) goto bridge_init_fail; /* * Add flags here, this is just an example */ pci_add_flags(PCI_ENABLE_PROC_DOMAINS | PCI_COMPAT_DOMAIN_0); pci_add_flags(PCI_REASSIGN_ALL_BUS | PCI_REASSIGN_ALL_RSRC); bus_range.end = pci_scan_child_bus(bridge->bus); pci_bus_update_busn_res_end(bridge->bus, bus_range.end); pci_assign_unassigned_bus_resources(bridge->bus); pci_bus_add_devices(bridge->bus); return 0; bridge_init_fail: kfree(pp); pci_free_resource_list(&resources); return err; } Best regards, Liviu Dudau [1] http://thread.gmane.org/gmane.linux.kernel.pci/25946 Liviu Dudau (1): pci: Add support for creating a generic host_bridge from device tree drivers/pci/host-bridge.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/pci/probe.c | 11 ++++++ include/linux/pci.h | 14 ++++++++ 3 files changed, 117 insertions(+) -- 1.8.5.3

11 years, 3 months

[PATCH V2 0/3] sched: idle_balance() cleanup and fix

by Daniel Lezcano

Peter, this patchset replace the beginning of the previous mixed one which was not yet commited [1] without changes except a compilation error fix for UP kernel config. It is refreshed against tip/sched/core. As the UP config compilation is broken on the previous patchset, git bisect is no longer safe for it. You can apply this small serie and drop the 3 first patches of the previous series [1], or ignore it and I will bring the fix after you applied [1]. It cleanups the idle_balance function parameters by passing the struct rq only, fixes a race in the idle_balance function and finally move the idle_stamp from fair.c to core.c. I am aware it will return back to fair.c with Peter's pending patches but at least it changes the idle_balance() function to return true if a balance occured. [1] https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg577271.html Changelog: V2: * fixed compilation errors when CONFIG_SMP=n V1: initial post Daniel Lezcano (3): sched: Remove cpu parameter for idle_balance() sched: Fix race in idle_balance() sched: Move idle_stamp up to the core kernel/sched/core.c | 13 +++++++++++-- kernel/sched/fair.c | 20 +++++++++++++------- kernel/sched/sched.h | 8 +------- 3 files changed, 25 insertions(+), 16 deletions(-) -- 1.7.9.5

11 years, 3 months

Re: [RFC PATCH V2] ARM: EXYNOS: Fix hotplug when CPUs boot in HYP mode

by Viresh Kumar

Getting rid of mainline and getting Linaro list in.. On Tue, May 7, 2013 at 11:21 AM, <giridhar.maruthy(a)linaro.org> wrote: > From: Giridhar Maruthy <giridhar.maruthy(a)linaro.org> > > In intial boot-up, u-boot commit "3d28a181aab5e... arndale5250: Boot in Hyp > mode and enable architected timers" puts the CPUs in HYP mode. > > Hence, the CPUs need to be put in HYP mode when they are hot plugged out and > plugged in back. > > This patch is almost same as above u-boot patch, it additionally takes care > if the kernel is compiled with thumb-2 option. > > Signed-off-by: Giridhar Maruthy <giridhar.m(a)samsung.com> > Signed-off-by: Inderpal Singh <inderpal.singh(a)linaro.org> > --- > arch/arm/mach-exynos/headsmp.S | 114 ++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 114 insertions(+) I have been using this patch recently on mainline kernel and LNG kernel to get CPU hotplug working. Recently we saw crashes in LNG kernel even if this patch was in and found that this patch doesn't work well in case CONFIG_THUMB2_KERNEL is enabled in kernel. LNG kernels have that enabled by default.. [ 126.028362] IRQ153 no longer affine to CPU1 [ 126.028732] CPU1: shutdown [ 126.028771] Internal error: Oops - undefined instruction: 0 [#1] PREEMPT SMP THUMB2 [ 126.028796] Modules linked in: [ 126.028846] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.12.9-00184-g0e7f8d5 #35 [ 126.028878] task: ef09e080 ti: ef0be000 task.ti: ef0be000 [ 126.028905] PC is at 0xc065e6ae [ 126.028958] LR is at exynos_cpu_die+0x4f/0xc4 [ 126.029014] pc : [<c065e6ae>] lr : [<c025b06f>] psr: 60070093 [ 126.029014] sp : ef0bffc8 ip : 00000001 fp : 00000000 [ 126.029043] r10: 00000000 r9 : 00000001 r8 : c03fc98f [ 126.029081] r7 : 00000000 r6 : f8182080 r5 : c03cfc60 r4 : c03cfa9c [ 126.029118] r3 : 02000002 r2 : 00000000 r1 : 701fe00a r0 : 00000001 [ 126.029151] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel [ 126.029186] Control: 50c53879 Table: 4000406a DAC: 00000015 [ 126.029219] Process swapper/1 (pid: 0, stack limit = 0xef0be240) [ 126.029248] Stack: (0xef0bffc8 to 0xef0c0000) [ 126.029309] ffc0: 00000001 00000001 c02629a4 00000001 c03cc44c c02629a4 [ 126.029385] ffe0: c03fc98f c025aff7 ef0be000 c003e435 c03fccf8 400084c9 ffffffff ffffbfff [ 126.029505] [<c025b06f>] (exynos_cpu_die+0x4f/0xc4) from [<c025aff7>] (cpu_die+0x27/0x50) [ 126.029639] [<c025aff7>] (cpu_die+0x27/0x50) from [<c003e435>] (cpu_startup_entry+0xbd/0xe8) [ 126.029750] [<c003e435>] (cpu_startup_entry+0xbd/0xe8) from [<400084c9>] (0x400084c9) [ 126.029809] Code: 00000000 00005000 00000000 ffff0000 (0000ffff) [ 126.029838] ---[ end trace fbec164dd7bcae1c ]--- [ 126.029868] Kernel panic - not syncing: Attempted to kill the idle task! [ 126.173782] CPU0: stopping [ 126.176429] CPU: 0 PID: 1962 Comm: bash Tainted: G D 3.12.9-00184-g0e7f8d5 #35 [ 126.184394] [<c00110ad>] (unwind_backtrace+0x1/0x98) from [<c000ee53>] (show_stack+0xb/0xc) [ 126.192584] [<c000ee53>] (show_stack+0xb/0xc) from [<c025d613>] (dump_stack+0x4b/0x7c) [ 126.200354] [<c025d613>] (dump_stack+0x4b/0x7c) from [<c00107c3>] (handle_IPI+0xa3/0xc4) [ 126.208295] [<c00107c3>] (handle_IPI+0xa3/0xc4) from [<c000842d>] (gic_handle_irq+0x4d/0x54) [ 126.216582] [<c000842d>] (gic_handle_irq+0x4d/0x54) from [<c000f65b>] (__irq_svc+0x3b/0x80) [ 126.224775] Exception stack(0xee05fde8 to 0xee05fe30) [ 126.229727] fde0: 00000000 c1462390 ee05fe28 00000000 0000000e 00000001 [ 126.237759] fe00: c03d37ac c03ffb18 00000000 00000000 00000000 60070013 00000020 ee05fe30 [ 126.245785] fe20: c003cf41 c003d558 40070033 ffffffff [ 126.250748] [<c000f65b>] (__irq_svc+0x3b/0x80) from [<c003d558>] (vprintk_emit+0x158/0x370) [ 126.258947] [<c003d558>] (vprintk_emit+0x158/0x370) from [<c025bbdd>] (printk+0x21/0x2c) [ 126.266887] [<c025bbdd>] (printk+0x21/0x2c) from [<c00104e3>] (__cpu_die+0x1f/0x58) [ 126.274402] [<c00104e3>] (__cpu_die+0x1f/0x58) from [<c025b1f7>] (_cpu_down+0xa7/0x198) [ 126.282260] [<c025b1f7>] (_cpu_down+0xa7/0x198) from [<c025b2fd>] (cpu_down+0x15/0x28) [ 126.290036] [<c025b2fd>] (cpu_down+0x15/0x28) from [<c017571d>] (device_offline+0x4d/0x74) [ 126.298150] [<c017571d>] (device_offline+0x4d/0x74) from [<c01757c1>] (online_store+0x29/0x44) [ 126.306605] [<c01757c1>] (online_store+0x29/0x44) from [<c01741cb>] (dev_attr_store+0xb/0x14) [ 126.314978] [<c01741cb>] (dev_attr_store+0xb/0x14) from [<c00b64c5>] (sysfs_write_file+0xe5/0x10c) [ 126.323775] [<c00b64c5>] (sysfs_write_file+0xe5/0x10c) from [<c007c2b9>] (vfs_write+0x6d/0x104) [ 126.332312] [<c007c2b9>] (vfs_write+0x6d/0x104) from [<c007c53d>] (SyS_write+0x29/0x4c) [ 126.340170] [<c007c53d>] (SyS_write+0x29/0x4c) from [<c000cba1>] (ret_fast_syscall+0x1/0x46) Don't know why we need that for though (i.e. the config option).. -- viresh

11 years, 3 months

next boot: 37 pass, 0 fail (next-20140213)

by Kevin's boot bot

Automated DT boot report for various ARM defconfigs. Tree/Branch: next Git describe: next-20140213 Full Report =========== omap2plus_defconfig ------------------- am335x-boneblack PASS: 0 min 26.0 sec omap3-beagle-xm PASS: 1 min 0.5 sec omap4-panda PASS: 1 min 7.2 sec omap3-tobi PASS: 0 min 23.0 sec am335x-bone PASS: 0 min 27.7 sec omap5-uevm PASS: 1 min 1.8 sec omap4-panda-es PASS: 1 min 7.4 sec multi_lpae_defconfig -------------------- omap5-uevm PASS: 1 min 45.5 sec sun7i-a20-cubieboard2 PASS: 0 min 14.8 sec tegra_defconfig --------------- tegra30-beaver PASS: 0 min 17.4 sec imx_v6_v7_defconfig ------------------- imx6dl-wandboard,wand-dual PASS: 0 min 18.8 sec imx6dl-wandboard,wand-solo PASS: 0 min 18.6 sec imx6q-wandboard PASS: 0 min 17.2 sec msm_defconfig ------------- qcom-apq8074-dragonboard PASS: 1 min 4.2 sec bcm_defconfig ------------- bcm28155-ap PASS: 0 min 59.0 sec sunxi_defconfig --------------- sun7i-a20-cubieboard2 PASS: 0 min 13.1 sec sun4i-a10-cubieboard PASS: 0 min 17.5 sec exynos_defconfig ---------------- exynos5250-arndale PASS: 0 min 29.2 sec multi_v7_defconfig ------------------ ste-snowball PASS: 1 min 17.4 sec tegra30-beaver PASS: 0 min 23.0 sec am335x-boneblack PASS: 0 min 23.3 sec omap3-beagle-xm PASS: 0 min 47.1 sec sun7i-a20-cubieboard2 PASS: 0 min 14.2 sec armada-370-mirabox PASS: 0 min 22.0 sec omap4-panda PASS: 0 min 53.3 sec armada-xp-openblocks-ax3-4 PASS: 0 min 55.9 sec sun4i-a10-cubieboard PASS: 0 min 19.0 sec bcm28155-ap PASS: 1 min 4.6 sec imx6dl-wandboard,wand-solo PASS: 0 min 18.0 sec omap3-tobi PASS: 0 min 21.6 sec am335x-bone PASS: 0 min 26.2 sec omap5-uevm PASS: 1 min 45.0 sec imx6q-wandboard PASS: 0 min 16.9 sec omap4-panda-es PASS: 0 min 59.9 sec imx6dl-wandboard,wand-dual PASS: 0 min 18.3 sec u8500_defconfig --------------- ste-snowball PASS: 0 min 33.0 sec sama5_defconfig --------------- sama5d35ek PASS: 0 min 17.6 sec

11 years, 3 months

mainline boot: 35 pass, 2 fail (v3.14-rc2-271-g4675348)

by Kevin's boot bot

Automated DT boot report for various ARM defconfigs. Tree/Branch: mainline Git describe: v3.14-rc2-271-g4675348 Failed boot tests (console logs at the end) =========================================== armada-xp-openblocks-ax3-4: FAIL: multi_v7_defconfig armada-xp-openblocks-ax3-4: FAIL: mvebu_defconfig Full Report =========== omap2plus_defconfig ------------------- am335x-boneblack PASS: 0 min 25.5 sec omap3-beagle-xm PASS: 0 min 58.8 sec omap4-panda PASS: 1 min 14.0 sec am335x-bone PASS: 0 min 27.4 sec omap5-uevm PASS: 1 min 0.2 sec omap4-panda-es PASS: 1 min 10.3 sec multi_lpae_defconfig -------------------- omap5-uevm PASS: 1 min 38.0 sec sun7i-a20-cubieboard2 PASS: 0 min 14.4 sec tegra_defconfig --------------- tegra30-beaver PASS: 0 min 17.0 sec imx_v6_v7_defconfig ------------------- imx6dl-wandboard,wand-dual PASS: 0 min 18.7 sec imx6dl-wandboard,wand-solo PASS: 0 min 18.7 sec imx6q-wandboard PASS: 0 min 17.3 sec msm_defconfig ------------- qcom-apq8074-dragonboard PASS: 0 min 59.2 sec bcm_defconfig ------------- bcm28155-ap PASS: 1 min 14.6 sec sunxi_defconfig --------------- sun7i-a20-cubieboard2 PASS: 0 min 12.9 sec sun4i-a10-cubieboard PASS: 0 min 17.7 sec exynos_defconfig ---------------- exynos5250-arndale PASS: 0 min 29.7 sec multi_v7_defconfig ------------------ ste-snowball PASS: 1 min 17.4 sec tegra30-beaver PASS: 0 min 20.0 sec am335x-boneblack PASS: 0 min 23.5 sec omap3-beagle-xm PASS: 0 min 51.6 sec sun7i-a20-cubieboard2 PASS: 0 min 14.4 sec armada-370-mirabox PASS: 0 min 22.3 sec omap4-panda PASS: 0 min 58.2 sec armada-xp-openblocks-ax3-4 FAIL: 0 min 22.8 sec sun4i-a10-cubieboard PASS: 0 min 19.1 sec bcm28155-ap PASS: 1 min 18.7 sec imx6dl-wandboard,wand-solo PASS: 0 min 18.0 sec am335x-bone PASS: 0 min 26.2 sec omap5-uevm PASS: 1 min 46.3 sec imx6q-wandboard PASS: 0 min 17.7 sec omap4-panda-es PASS: 0 min 51.1 sec imx6dl-wandboard,wand-dual PASS: 0 min 18.0 sec u8500_defconfig --------------- ste-snowball PASS: 0 min 33.2 sec sama5_defconfig --------------- sama5d35ek PASS: 0 min 17.5 sec mvebu_defconfig --------------- armada-xp-openblocks-ax3-4 FAIL: 0 min 20.2 sec armada-370-mirabox PASS: 0 min 20.3 sec Console logs for failures ========================= multi_v7_defconfig ------------------ armada-xp-openblocks-ax3-4: FAIL: last 80 lines of boot log: ------------------------------------------------------------ [ 0.434624] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.455881] d0012000.serial: ttyS0 at MMIO 0xd0012000 (irq = 20, base_baud = 15625000) is a 16550A [ 1.189051] console [ttyS0] enabled [ 1.213047] d0012100.serial: ttyS1 at MMIO 0xd0012100 (irq = 21, base_baud = 15625000) is a 16550A [ 1.222267] Serial: IMX driver [ 1.225538] STMicroelectronics ASC driver initialized [ 1.230959] serial: Freescale lpuart driver [ 1.235248] [drm] Initialized drm 1.1.0 20060810 [ 1.242863] loop: module loaded [ 1.246479] sata_mv d00a0000.sata: version 1.28 [ 1.251105] sata_mv d00a0000.sata: unable to find phy [ 1.256178] Unable to handle kernel NULL pointer dereference at virtual address 00000054 [ 1.264308] pgd = c0004000 [ 1.267031] [00000054] *pgd=00000000 [ 1.270629] Internal error: Oops: 5 [#1] SMP ARM [ 1.275255] Modules linked in: [ 1.278330] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc2-00271-g4675348 #1 [ 1.285918] task: ed04c000 ti: ed058000 task.ti: ed058000 [ 1.291339] PC is at __clk_put+0x1c/0x8c [ 1.295273] LR is at clk_prepare_lock+0x10/0xfc [ 1.299815] pc : [<c0494858>] lr : [<c0491f04>] psr: 60000113 [ 1.299815] sp : ed059e10 ip : 00000000 fp : 0000001f [ 1.311320] r10: ed399b90 r9 : ed0d3c00 r8 : 00000004 [ 1.316557] r7 : ffffffed r6 : 00000000 r5 : ed1530d0 r4 : 00000000 [ 1.323100] r3 : ed04c000 r2 : ed04c000 r1 : ed059e00 r0 : 00000054 [ 1.329643] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 1.336970] Control: 10c5387d Table: 0000406a DAC: 00000015 [ 1.342729] Process swapper/0 (pid: 1, stack limit = 0xed058240) [ 1.348751] Stack: (0xed059e10 to 0xed05a000) [ 1.353119] 9e00: 00000001 c036197c c085c730 000000df [ 1.361318] 9e20: ed0ce1b0 00000002 c0609db4 00000000 74726f70 ed0c0030 00000001 ed3a1990 [ 1.369517] 9e40: 000000df ed0d3c10 c091eb38 00000000 c091eb38 c085c730 000000df ed058030 [ 1.377717] 9e60: 00000000 c0304e58 c0304e40 ed0d3c10 c0987d8c c03036b4 00000000 ed0d3c10 [ 1.385917] 9e80: c091eb38 ed0d3c44 00000000 c03038a0 00000000 c091eb38 c0303814 c0301ccc [ 1.394116] 9ea0: ed03b85c ed09a934 c091eb38 ed399b00 c0918ef8 c0302e7c c0777f08 c094d7c0 [ 1.402317] 9ec0: c091eb38 c091eb38 00000006 c094d7c0 c094d7c0 c0303ea4 00000000 c08a11ac [ 1.410516] 9ee0: 00000006 c085c760 c08a11ac c0008bbc ed003c00 c072c664 ed0c7380 c05a5da0 [ 1.418715] 9f00: 00000000 c094d7c0 c082350c c012dcb0 00000000 c08e83d8 60000113 00000001 [ 1.426915] 9f20: ee7ffe1b c05b5578 000000df c005d48c c07ed554 00000006 ee7ffe26 00000006 [ 1.435114] 9f40: c08e83c8 c08a11ac 00000006 c094d7c0 c094d7c0 c082350c 000000df c08838dc [ 1.443314] 9f60: c08838d0 c0823c48 00000006 00000006 c082350c 88855891 15413309 b850a414 [ 1.451513] 9f80: 05a48542 00000000 c0594fec 00000000 00000000 00000000 00000000 00000000 [ 1.459713] 9fa0: 00000000 c0594ff4 00000000 c000e5b8 00000000 00000000 00000000 00000000 [ 1.467913] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 1.476112] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 d9451725 254584d0 [ 1.484320] [<c0494858>] (__clk_put) from [<c036197c>] (mv_platform_probe+0x2c0/0x43c) [ 1.492265] [<c036197c>] (mv_platform_probe) from [<c0304e58>] (platform_drv_probe+0x18/0x48) [ 1.500815] [<c0304e58>] (platform_drv_probe) from [<c03036b4>] (driver_probe_device+0x124/0x240) [ 1.509712] [<c03036b4>] (driver_probe_device) from [<c03038a0>] (__driver_attach+0x8c/0x90) [ 1.518173] [<c03038a0>] (__driver_attach) from [<c0301ccc>] (bus_for_each_dev+0x60/0x94) [ 1.526374] [<c0301ccc>] (bus_for_each_dev) from [<c0302e7c>] (bus_add_driver+0x148/0x1f0) [ 1.534662] [<c0302e7c>] (bus_add_driver) from [<c0303ea4>] (driver_register+0x78/0xf8) [ 1.542689] [<c0303ea4>] (driver_register) from [<c085c760>] (mv_init+0x30/0x50) [ 1.550108] [<c085c760>] (mv_init) from [<c0008bbc>] (do_one_initcall+0xf8/0x144) [ 1.557617] [<c0008bbc>] (do_one_initcall) from [<c0823c48>] (kernel_init_freeable+0x13c/0x1dc) [ 1.566342] [<c0823c48>] (kernel_init_freeable) from [<c0594ff4>] (kernel_init+0x8/0xf0) [ 1.574458] [<c0594ff4>] (kernel_init) from [<c000e5b8>] (ret_from_fork+0x14/0x3c) [ 1.582049] Code: 8a000012 ebfff5a8 e2840054 f57ff05b (e1903f9f) [ 1.588191] ---[ end trace d252a005e68fc3f1 ]--- [ 1.592830] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 1.592830] [ 1.601991] CPU0: stopping [ 1.604708] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G D 3.14.0-rc2-00271-g4675348 #1 [ 1.613266] [<c001588c>] (unwind_backtrace) from [<c001143c>] (show_stack+0x10/0x14) [ 1.621036] [<c001143c>] (show_stack) from [<c059ab60>] (dump_stack+0x84/0x94) [ 1.628280] [<c059ab60>] (dump_stack) from [<c0014160>] (handle_IPI+0x148/0x174) [ 1.635697] [<c0014160>] (handle_IPI) from [<c00086fc>] (armada_370_xp_handle_irq+0xa8/0x110) [ 1.644246] [<c00086fc>] (armada_370_xp_handle_irq) from [<c0011fc0>] (__irq_svc+0x40/0x50) [ 1.652617] Exception stack(0xc08a5f68 to 0xc08a5fb0) [ 1.657683] 5f60: ffffffed 2d734000 c08ad4e4 00000000 c08ac4cc c08a4000 [ 1.665883] 5f80: c08ac450 c094d64b c05a5128 c08a4000 c094d64b c08a4000 00000000 c08a5fb0 [ 1.674082] 5fa0: c000f158 c0081194 60000113 ffffffff [ 1.679153] [<c0011fc0>] (__irq_svc) from [<c0081194>] (cpu_startup_entry+0x100/0x144) [ 1.687094] [<c0081194>] (cpu_startup_entry) from [<c0823b00>] (start_kernel+0x358/0x364) [ 1.695295] [<c0823b00>] (start_kernel) from [<00008074>] (0x8074) ~$off # PYBOOT: Exception: kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000054 # PYBOOT: Time: 22.78 seconds. # PYBOOT: Result: FAIL mvebu_defconfig --------------- armada-xp-openblocks-ax3-4: FAIL: last 80 lines of boot log: ------------------------------------------------------------ mv_xor d0060900.xor: Marvell shared XOR driver mv_xor d0060900.xor: Marvell XOR: ( xor cpy ) mv_xor d0060900.xor: Marvell XOR: ( xor cpy ) mv_xor d00f0900.xor: Marvell shared XOR driver mv_xor d00f0900.xor: Marvell XOR: ( xor cpy ) mv_xor d00f0900.xor: Marvell XOR: ( xor cpy ) Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled d0012000.serial: ttyS0 at MMIO 0xd0012000 (irq = 20, base_baud = 15625000) is a 16550A console [ttyS0] enabled d0012100.serial: ttyS1 at MMIO 0xd0012100 (irq = 21, base_baud = 15625000) is a 16550A sata_mv d00a0000.sata: version 1.28 sata_mv d00a0000.sata: error getting phy Unable to handle kernel NULL pointer dereference at virtual address 00000054 pgd = c0004000 [00000054] *pgd=00000000 Internal error: Oops: 5 [#1] SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc2-00271-g4675348 #1 task: ee82ab80 ti: ee83c000 task.ti: ee83c000 PC is at __clk_put+0x1c/0x8c LR is at clk_prepare_lock+0x10/0xfc pc : [<c02c93e0>] lr : [<c02c6a8c>] psr: 60000113 sp : ee83de08 ip : 00000000 fp : ee807900 r10: ee990290 r9 : ee90b200 r8 : ffffffda r7 : ee90b210 r6 : 00000000 r5 : eebefed0 r4 : 00000000 r3 : ee82ab80 r2 : ee82ab80 r1 : ee83ddf8 r0 : 00000054 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 10c53c7d Table: 0000406a DAC: 00000015 Process swapper/0 (pid: 1, stack limit = 0xee83c240) Stack: (0xee83de08 to 0xee83e000) de00: 00000001 c01ff8b4 ee910e10 c00ff9c4 c04e283c 0000001f de20: ee910e10 00000002 c03c3d40 00000000 74726f70 ee910030 00000001 ee261ca8 de40: 00000086 ee90b210 c0519090 00000000 c0519090 c04e283c 00000086 ee83c030 de60: 00000000 c01c9bb0 c01c9b98 c0551d88 ee90b210 c01c8338 00000007 ee90b210 de80: c0519090 ee90b244 00000000 c01c85b8 00000000 c0519090 c01c8520 c01c6a30 dea0: ee85a7dc ee85e1b4 c0519090 ee990300 c05180c0 c01c7be0 c046c4bc c052edc0 dec0: c0519090 c0519090 00000006 c052edc0 c052edc0 c01c8bfc 00000000 c04f7464 dee0: 00000006 c04e286c c04f7464 c00088bc 00000086 ef7fce08 c04544a0 00000000 df00: 00000000 c04ad248 00000063 ee83df20 c0035c2c c0035c50 00000113 ffffffff df20: ef7fce1b c03bd7e0 00000086 c0035e20 c04acc78 00000006 ef7fce26 00000006 df40: c0507b70 c04f7464 00000006 c052edc0 c052edc0 c04ce50c 00000086 c04f0b14 df60: c04f0b08 c04cec40 00000006 00000006 c04ce50c d456f45d 0fbbed6f 47affddf df80: fbff7bce 00000000 c03a0828 00000000 00000000 00000000 00000000 00000000 dfa0: 00000000 c03a0830 00000000 c000e298 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 9757fff7 dd7dfd3b [<c02c93e0>] (__clk_put) from [<c01ff8b4>] (mv_platform_probe+0x2ac/0x414) [<c01ff8b4>] (mv_platform_probe) from [<c01c9bb0>] (platform_drv_probe+0x18/0x48) [<c01c9bb0>] (platform_drv_probe) from [<c01c8338>] (really_probe+0x80/0x214) [<c01c8338>] (really_probe) from [<c01c85b8>] (__driver_attach+0x98/0x9c) [<c01c85b8>] (__driver_attach) from [<c01c6a30>] (bus_for_each_dev+0x60/0x94) [<c01c6a30>] (bus_for_each_dev) from [<c01c7be0>] (bus_add_driver+0x148/0x1f0) [<c01c7be0>] (bus_add_driver) from [<c01c8bfc>] (driver_register+0x78/0xf8) [<c01c8bfc>] (driver_register) from [<c04e286c>] (mv_init+0x30/0x50) [<c04e286c>] (mv_init) from [<c00088bc>] (do_one_initcall+0xf8/0x144) [<c00088bc>] (do_one_initcall) from [<c04cec40>] (kernel_init_freeable+0x138/0x1d8) [<c04cec40>] (kernel_init_freeable) from [<c03a0830>] (kernel_init+0x8/0xf0) [<c03a0830>] (kernel_init) from [<c000e298>] (ret_from_fork+0x14/0x3c) Code: 8a000012 ebfff5a8 e2840054 f57ff05b (e1903f9f) ---[ end trace 205a99d38dd3a358 ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b CPU1: stopping CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D 3.14.0-rc2-00271-g4675348 #1 [<c0014844>] (unwind_backtrace) from [<c00110f4>] (show_stack+0x10/0x14) [<c00110f4>] (show_stack) from [<c03a5028>] (dump_stack+0x80/0x90) [<c03a5028>] (dump_stack) from [<c0013c04>] (handle_IPI+0x148/0x170) [<c0013c04>] (handle_IPI) from [<c00085ac>] (armada_370_xp_handle_irq+0xac/0xb0) [<c00085ac>] (armada_370_xp_handle_irq) from [<c0011c20>] (__irq_svc+0x40/0x50) Exception stack(0xee877fa0 to 0xee877fe8) 7fa0: eefe65b8 00000000 00000948 00000000 ee876000 c05024ac c03ac9cc ee876000 7fc0: c052ec76 00000001 c052ec76 ee876000 00000000 ee877fe8 c000ee0c c0055754 7fe0: 60000113 ffffffff [<c0011c20>] (__irq_svc) from [<c0055754>] (cpu_startup_entry+0xf4/0x134) [<c0055754>] (cpu_startup_entry) from [<00008644>] (0x8644) ~$off # PYBOOT: Exception: kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000054 # PYBOOT: Time: 20.18 seconds. # PYBOOT: Result: FAIL

11 years, 3 months

[PATCH Resend] PM: Remove unnecessary !!

by Viresh Kumar

Double ! or !! are normally required to get 0 or 1 out of a expression. A comparision always returns 0 or 1 and hence there is no need to apply double ! over it again. Signed-off-by: Viresh Kumar <viresh.kumar(a)linaro.org> --- kernel/power/suspend.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 62ee437..90b3d93 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -39,7 +39,7 @@ static const struct platform_suspend_ops *suspend_ops; static bool need_suspend_ops(suspend_state_t state) { - return !!(state > PM_SUSPEND_FREEZE); + return state > PM_SUSPEND_FREEZE; } static DECLARE_WAIT_QUEUE_HEAD(suspend_freeze_wait_head); -- 1.7.12.rc2.18.g61b472e

11 years, 3 months

Re: Is it ok for deferrable timer wakeup the idle cpu?

by Viresh Kumar

On 23 January 2014 11:11, Lei Wen <adrian.wenl(a)gmail.com> wrote: > On Wed, Jan 22, 2014 at 10:07 PM, Thomas Gleixner <tglx(a)linutronix.de> wrote: >> On Wed, 22 Jan 2014, Lei Wen wrote: >>> Recently I want to do the experiment for cpu isolation over 3.10 kernel. >>> But I find the isolated one is periodically waken up by IPI interrupt. >>> >>> By checking the trace, I find those IPI is generated by add_timer_on, >>> which would calls wake_up_nohz_cpu, and wake up the already idle cpu. >>> >>> With further checking, I find this timer is added by on_demand governor of >>> cpufreq. It would periodically check each cores' state. >>> The problem I see here is cpufreq_governor using INIT_DEFERRABLE_WORK >>> as the tool, while timer is made as deferrable anyway. >>> And what is more that cpufreq checking is very frequent. In my case, the >>> isolated cpu is wakenup by IPI every 5ms. >>> >>> So why kernel need to wake the remote processor when mount the deferrable >>> timer? As per my understanding, we'd better keep cpu as idle when use >>> the deferrable timer. >> >> Indeed, we can avoid the wakeup of the remote cpu when the timer is >> deferrable. > > Glad to hear that we could fix this unwanted wakeup. > Do you have related patches already? > >> >> Though you really want to figure out why the cpufreq governor is >> arming timers on other cores every 5ms. That smells like an utterly >> stupid approach. > > Not sure why cpufreq choose such frequent profiling over each cpu. > As my understanding, since kernel is smp, launching profiler over one cpu > would be enough... Hi Guys, So the first question is why cpufreq needs it and is it really stupid? Yes, it is stupid but that's how its implemented since a long time. It does so to get data about the load on CPUs, so that freq can be scaled up/down. Though there is a solution in discussion currently, which will take inputs from scheduler and so these background timers would go away. But we need to wait until that time. Now, why do we need that for every cpu, while that for a single cpu might be enough? The answer is cpuidle here: What if the cpu responsible for running timer goes to sleep? Who will evaluate the load then? And if we make this timer run on one cpu in non-deferrable mode then that cpu would be waken up again and again from idle. So, it was decided to have a per-cpu deferrable timer. Though to improve efficiency, once it is fired on any cpu, timer for all other CPUs are rescheduled, so that they don't fire before 5ms (sampling time).. I think below diff might get this fixed for you, though I am not sure if it breaks something else. Probably Thomas/Frederic can answer here. If this looks fine I will send it formally again: diff --git a/kernel/timer.c b/kernel/timer.c index accfd24..3a2c7fa 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -940,7 +940,8 @@ void add_timer_on(struct timer_list *timer, int cpu) * makes sure that a CPU on the way to stop its tick can not * evaluate the timer wheel. */ - wake_up_nohz_cpu(cpu); + if (!tbase_get_deferrable(timer->base)) + wake_up_nohz_cpu(cpu); spin_unlock_irqrestore(&base->lock, flags); } EXPORT_SYMBOL_GPL(add_timer_on);

11 years, 3 months

arm-soc boot: 34 pass, 1 fail (v3.14-rc2-24-g0ef783f)

by Kevin's boot bot

Automated DT boot report for various ARM defconfigs. Tree/Branch: arm-soc Git describe: v3.14-rc2-24-g0ef783f Failed boot tests (console logs at the end) =========================================== armada-xp-openblocks-ax3-4: FAIL: mvebu_defconfig Full Report =========== omap2plus_defconfig ------------------- am335x-boneblack PASS: 0 min 25.6 sec omap3-beagle-xm PASS: 1 min 1.9 sec omap4-panda PASS: 1 min 9.0 sec omap3-tobi PASS: 0 min 26.1 sec am335x-bone PASS: 0 min 27.6 sec omap4-panda-es PASS: 1 min 13.7 sec multi_lpae_defconfig -------------------- sun7i-a20-cubieboard2 PASS: 0 min 14.5 sec tegra_defconfig --------------- tegra30-beaver PASS: 0 min 17.1 sec imx_v6_v7_defconfig ------------------- imx6dl-wandboard,wand-dual PASS: 0 min 18.6 sec imx6dl-wandboard,wand-solo PASS: 0 min 18.5 sec imx6q-wandboard PASS: 0 min 17.2 sec sunxi_defconfig --------------- sun7i-a20-cubieboard2 PASS: 0 min 11.9 sec sun4i-a10-cubieboard PASS: 0 min 12.5 sec bcm_defconfig ------------- bcm28155-ap PASS: 0 min 58.9 sec exynos_defconfig ---------------- exynos5250-arndale PASS: 0 min 29.9 sec multi_v7_defconfig ------------------ ste-snowball PASS: 1 min 19.5 sec tegra30-beaver PASS: 0 min 26.8 sec am335x-boneblack PASS: 0 min 23.5 sec omap3-beagle-xm PASS: 0 min 54.0 sec sun7i-a20-cubieboard2 PASS: 0 min 14.2 sec armada-370-mirabox PASS: 0 min 22.3 sec omap4-panda PASS: 0 min 51.4 sec armada-xp-openblocks-ax3-4 PASS: 1 min 24.8 sec sun4i-a10-cubieboard PASS: 0 min 19.0 sec bcm28155-ap PASS: 1 min 20.0 sec imx6dl-wandboard,wand-solo PASS: 0 min 18.1 sec omap3-tobi PASS: 0 min 21.6 sec am335x-bone PASS: 0 min 26.2 sec imx6q-wandboard PASS: 0 min 17.3 sec omap4-panda-es PASS: 0 min 56.5 sec imx6dl-wandboard,wand-dual PASS: 0 min 18.4 sec u8500_defconfig --------------- ste-snowball PASS: 0 min 33.9 sec sama5_defconfig --------------- sama5d35ek PASS: 1 min 36.7 sec mvebu_defconfig --------------- armada-xp-openblocks-ax3-4 FAIL: 0 min 20.3 sec armada-370-mirabox PASS: 0 min 20.3 sec Console logs for failures ========================= mvebu_defconfig --------------- armada-xp-openblocks-ax3-4: FAIL: last 80 lines of boot log: ------------------------------------------------------------ mv_xor d0060900.xor: Marvell shared XOR driver mv_xor d0060900.xor: Marvell XOR: ( xor cpy ) mv_xor d0060900.xor: Marvell XOR: ( xor cpy ) mv_xor d00f0900.xor: Marvell shared XOR driver mv_xor d00f0900.xor: Marvell XOR: ( xor cpy ) mv_xor d00f0900.xor: Marvell XOR: ( xor cpy ) Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled d0012000.serial: ttyS0 at MMIO 0xd0012000 (irq = 20, base_baud = 15625000) is a 16550A console [ttyS0] enabled d0012100.serial: ttyS1 at MMIO 0xd0012100 (irq = 21, base_baud = 15625000) is a 16550A sata_mv d00a0000.sata: version 1.28 sata_mv d00a0000.sata: error getting phy -38 Unable to handle kernel NULL pointer dereference at virtual address 00000054 pgd = c0004000 [00000054] *pgd=00000000 Internal error: Oops: 5 [#1] SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc2-00024-g0ef783f #1 task: ee82ab80 ti: ee83c000 task.ti: ee83c000 PC is at __clk_put+0x1c/0x8c LR is at clk_prepare_lock+0x10/0xfc pc : [<c02c93a0>] lr : [<c02c6a4c>] psr: 60000113 sp : ee83de08 ip : 00000000 fp : ee807900 r10: eea85290 r9 : ee90b200 r8 : ffffffda r7 : ee90b210 r6 : 00000000 r5 : eebefed0 r4 : 00000000 r3 : ee82ab80 r2 : ee82ab80 r1 : ee83ddf8 r0 : 00000054 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 10c53c7d Table: 0000406a DAC: 00000015 Process swapper/0 (pid: 1, stack limit = 0xee83c240) Stack: (0xee83de08 to 0xee83e000) de00: 00000001 c01ff8b4 ee910e10 c00ff9c4 c04e283c 0000001f de20: ee910e10 00000002 c03c3d40 00000000 74726f70 ee910030 00000001 eea4eca8 de40: 00000086 ee90b210 c0519090 00000000 c0519090 c04e283c 00000086 ee83c030 de60: 00000000 c01c9bb0 c01c9b98 c0551d88 ee90b210 c01c8338 00000007 ee90b210 de80: c0519090 ee90b244 00000000 c01c85b8 00000000 c0519090 c01c8520 c01c6a30 dea0: ee85a7dc ee85e1b4 c0519090 eea85300 c05180c0 c01c7be0 c046c4bc c052edc0 dec0: c0519090 c0519090 00000006 c052edc0 c052edc0 c01c8bfc 00000000 c04f7464 dee0: 00000006 c04e286c c04f7464 c00088bc 00000086 ef7fce08 c04544a0 00000000 df00: 00000000 c04ad1d8 00000063 ee83df20 c0035c2c c0035c50 00000113 ffffffff df20: ef7fce1b c03bd7e0 00000086 c0035e20 c04acc78 00000006 ef7fce26 00000006 df40: c0507b70 c04f7464 00000006 c052edc0 c052edc0 c04ce50c 00000086 c04f0b14 df60: c04f0b08 c04cec40 00000006 00000006 c04ce50c d456fc5d 0fbbed6f 4faffddf df80: f9ff7bce 00000000 c03a080c 00000000 00000000 00000000 00000000 00000000 dfa0: 00000000 c03a0814 00000000 c000e298 00000000 00000000 00000000 00000000 dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 9757fff7 dd7dfd7b [<c02c93a0>] (__clk_put) from [<c01ff8b4>] (mv_platform_probe+0x2ac/0x414) [<c01ff8b4>] (mv_platform_probe) from [<c01c9bb0>] (platform_drv_probe+0x18/0x48) [<c01c9bb0>] (platform_drv_probe) from [<c01c8338>] (really_probe+0x80/0x214) [<c01c8338>] (really_probe) from [<c01c85b8>] (__driver_attach+0x98/0x9c) [<c01c85b8>] (__driver_attach) from [<c01c6a30>] (bus_for_each_dev+0x60/0x94) [<c01c6a30>] (bus_for_each_dev) from [<c01c7be0>] (bus_add_driver+0x148/0x1f0) [<c01c7be0>] (bus_add_driver) from [<c01c8bfc>] (driver_register+0x78/0xf8) [<c01c8bfc>] (driver_register) from [<c04e286c>] (mv_init+0x30/0x50) [<c04e286c>] (mv_init) from [<c00088bc>] (do_one_initcall+0xf8/0x144) [<c00088bc>] (do_one_initcall) from [<c04cec40>] (kernel_init_freeable+0x138/0x1d8) [<c04cec40>] (kernel_init_freeable) from [<c03a0814>] (kernel_init+0x8/0xf0) [<c03a0814>] (kernel_init) from [<c000e298>] (ret_from_fork+0x14/0x3c) Code: 8a000012 ebfff5a8 e2840054 f57ff05b (e1903f9f) ---[ end trace f721f17b32de3cd8 ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b CPU1: stopping CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D 3.14.0-rc2-00024-g0ef783f #1 [<c0014844>] (unwind_backtrace) from [<c00110f4>] (show_stack+0x10/0x14) [<c00110f4>] (show_stack) from [<c03a500c>] (dump_stack+0x80/0x90) [<c03a500c>] (dump_stack) from [<c0013c04>] (handle_IPI+0x148/0x170) [<c0013c04>] (handle_IPI) from [<c00085ac>] (armada_370_xp_handle_irq+0xac/0xb0) [<c00085ac>] (armada_370_xp_handle_irq) from [<c0011c20>] (__irq_svc+0x40/0x50) Exception stack(0xee877fa0 to 0xee877fe8) 7fa0: eefe65b8 00000000 0000094c 00000000 ee876000 c05024ac c03ac9cc ee876000 7fc0: c052ec76 00000001 c052ec76 ee876000 00000000 ee877fe8 c000ee0c c0055754 7fe0: 60000113 ffffffff [<c0011c20>] (__irq_svc) from [<c0055754>] (cpu_startup_entry+0xf4/0x134) [<c0055754>] (cpu_startup_entry) from [<00008644>] (0x8644) ~$off # PYBOOT: Exception: kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000054 # PYBOOT: Time: 20.26 seconds. # PYBOOT: Result: FAIL

11 years, 3 months

mainline boot: 35 pass, 2 fail (v3.14-rc2-267-g9398a10)

by Kevin's boot bot

Automated DT boot report for various ARM defconfigs. Tree/Branch: mainline Git describe: v3.14-rc2-267-g9398a10 Failed boot tests (console logs at the end) =========================================== armada-xp-openblocks-ax3-4: FAIL: multi_v7_defconfig armada-xp-openblocks-ax3-4: FAIL: mvebu_defconfig Full Report =========== omap2plus_defconfig ------------------- am335x-boneblack PASS: 0 min 25.4 sec omap3-beagle-xm PASS: 1 min 0.0 sec omap4-panda PASS: 1 min 18.7 sec am335x-bone PASS: 0 min 27.2 sec omap5-uevm PASS: 1 min 0.9 sec omap4-panda-es PASS: 1 min 9.0 sec multi_lpae_defconfig -------------------- omap5-uevm PASS: 1 min 42.3 sec sun7i-a20-cubieboard2 PASS: 0 min 14.0 sec tegra_defconfig --------------- tegra30-beaver PASS: 0 min 17.0 sec imx_v6_v7_defconfig ------------------- imx6dl-wandboard,wand-dual PASS: 0 min 18.3 sec imx6dl-wandboard,wand-solo PASS: 0 min 18.2 sec imx6q-wandboard PASS: 0 min 17.0 sec msm_defconfig ------------- qcom-apq8074-dragonboard PASS: 1 min 4.6 sec bcm_defconfig ------------- bcm28155-ap PASS: 0 min 53.7 sec sunxi_defconfig --------------- sun7i-a20-cubieboard2 PASS: 0 min 12.7 sec sun4i-a10-cubieboard PASS: 0 min 15.4 sec exynos_defconfig ---------------- exynos5250-arndale PASS: 0 min 29.1 sec multi_v7_defconfig ------------------ ste-snowball PASS: 1 min 17.4 sec tegra30-beaver PASS: 0 min 19.5 sec am335x-boneblack PASS: 0 min 23.3 sec omap3-beagle-xm PASS: 0 min 50.3 sec sun7i-a20-cubieboard2 PASS: 0 min 14.0 sec armada-370-mirabox PASS: 0 min 21.1 sec omap4-panda PASS: 0 min 52.7 sec armada-xp-openblocks-ax3-4 FAIL: 0 min 21.8 sec sun4i-a10-cubieboard PASS: 0 min 21.4 sec bcm28155-ap PASS: 1 min 8.6 sec imx6dl-wandboard,wand-solo PASS: 0 min 17.7 sec am335x-bone PASS: 0 min 26.2 sec omap5-uevm PASS: 1 min 48.8 sec imx6q-wandboard PASS: 0 min 17.0 sec omap4-panda-es PASS: 0 min 57.8 sec imx6dl-wandboard,wand-dual PASS: 0 min 18.2 sec u8500_defconfig --------------- ste-snowball PASS: 0 min 33.9 sec sama5_defconfig --------------- sama5d35ek PASS: 0 min 17.5 sec mvebu_defconfig --------------- armada-xp-openblocks-ax3-4 FAIL: 0 min 19.1 sec armada-370-mirabox PASS: 0 min 17.3 sec Console logs for failures ========================= multi_v7_defconfig ------------------ armada-xp-openblocks-ax3-4: FAIL: last 80 lines of boot log: ------------------------------------------------------------ [ 0.434670] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.455927] d0012000.serial: ttyS0 at MMIO 0xd0012000 (irq = 20, base_baud = 15625000) is a 16550A [ 1.189115] console [ttyS0] enabled [ 1.213108] d0012100.serial: ttyS1 at MMIO 0xd0012100 (irq = 21, base_baud = 15625000) is a 16550A [ 1.222328] Serial: IMX driver [ 1.225599] STMicroelectronics ASC driver initialized [ 1.231021] serial: Freescale lpuart driver [ 1.235310] [drm] Initialized drm 1.1.0 20060810 [ 1.242922] loop: module loaded [ 1.246557] sata_mv d00a0000.sata: version 1.28 [ 1.251162] sata_mv d00a0000.sata: unable to find phy [ 1.256236] Unable to handle kernel NULL pointer dereference at virtual address 00000054 [ 1.264366] pgd = c0004000 [ 1.267088] [00000054] *pgd=00000000 [ 1.270685] Internal error: Oops: 5 [#1] SMP ARM [ 1.275312] Modules linked in: [ 1.278388] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc2-00267-g9398a10 #1 [ 1.285976] task: ed04c000 ti: ed058000 task.ti: ed058000 [ 1.291398] PC is at __clk_put+0x1c/0x8c [ 1.295331] LR is at clk_prepare_lock+0x10/0xfc [ 1.299873] pc : [<c0494858>] lr : [<c0491f04>] psr: 60000113 [ 1.299873] sp : ed059e10 ip : 00000000 fp : 0000001f [ 1.311378] r10: ed399b90 r9 : ed0d3c00 r8 : 00000004 [ 1.316615] r7 : ffffffed r6 : 00000000 r5 : ed1530d0 r4 : 00000000 [ 1.323159] r3 : ed04c000 r2 : ed04c000 r1 : ed059e00 r0 : 00000054 [ 1.329703] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 1.337029] Control: 10c5387d Table: 0000406a DAC: 00000015 [ 1.342788] Process swapper/0 (pid: 1, stack limit = 0xed058240) [ 1.348808] Stack: (0xed059e10 to 0xed05a000) [ 1.353177] 9e00: 00000001 c036197c c085c730 000000df [ 1.361377] 9e20: ed0ce1b0 00000002 c0609db4 00000000 74726f70 ed0c0030 00000001 ed3a1990 [ 1.369577] 9e40: 000000df ed0d3c10 c091eb38 00000000 c091eb38 c085c730 000000df ed058030 [ 1.377777] 9e60: 00000000 c0304e58 c0304e40 ed0d3c10 c0987d8c c03036b4 00000000 ed0d3c10 [ 1.385977] 9e80: c091eb38 ed0d3c44 00000000 c03038a0 00000000 c091eb38 c0303814 c0301ccc [ 1.394177] 9ea0: ed03b85c ed09a934 c091eb38 ed399b00 c0918ef8 c0302e7c c0777f08 c094d7c0 [ 1.402377] 9ec0: c091eb38 c091eb38 00000006 c094d7c0 c094d7c0 c0303ea4 00000000 c08a11ac [ 1.410577] 9ee0: 00000006 c085c760 c08a11ac c0008bbc ed003c00 c072c664 ed0c7380 c05a5da0 [ 1.418777] 9f00: 00000000 c094d7c0 c082350c c012dcb0 00000000 c08e83d8 60000113 00000001 [ 1.426977] 9f20: ee7ffe1b c05b5578 000000df c005d48c c07ed554 00000006 ee7ffe26 00000006 [ 1.435177] 9f40: c08e83c8 c08a11ac 00000006 c094d7c0 c094d7c0 c082350c 000000df c08838dc [ 1.443377] 9f60: c08838d0 c0823c48 00000006 00000006 c082350c 80854010 44401209 90100404 [ 1.451576] 9f80: 01a08002 00000000 c0594fec 00000000 00000000 00000000 00000000 00000000 [ 1.459776] 9fa0: 00000000 c0594ff4 00000000 c000e5b8 00000000 00000000 00000000 00000000 [ 1.467976] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 1.476175] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 01400721 25008000 [ 1.484384] [<c0494858>] (__clk_put) from [<c036197c>] (mv_platform_probe+0x2c0/0x43c) [ 1.492329] [<c036197c>] (mv_platform_probe) from [<c0304e58>] (platform_drv_probe+0x18/0x48) [ 1.500880] [<c0304e58>] (platform_drv_probe) from [<c03036b4>] (driver_probe_device+0x124/0x240) [ 1.509777] [<c03036b4>] (driver_probe_device) from [<c03038a0>] (__driver_attach+0x8c/0x90) [ 1.518239] [<c03038a0>] (__driver_attach) from [<c0301ccc>] (bus_for_each_dev+0x60/0x94) [ 1.526439] [<c0301ccc>] (bus_for_each_dev) from [<c0302e7c>] (bus_add_driver+0x148/0x1f0) [ 1.534727] [<c0302e7c>] (bus_add_driver) from [<c0303ea4>] (driver_register+0x78/0xf8) [ 1.542754] [<c0303ea4>] (driver_register) from [<c085c760>] (mv_init+0x30/0x50) [ 1.550173] [<c085c760>] (mv_init) from [<c0008bbc>] (do_one_initcall+0xf8/0x144) [ 1.557682] [<c0008bbc>] (do_one_initcall) from [<c0823c48>] (kernel_init_freeable+0x13c/0x1dc) [ 1.566407] [<c0823c48>] (kernel_init_freeable) from [<c0594ff4>] (kernel_init+0x8/0xf0) [ 1.574522] [<c0594ff4>] (kernel_init) from [<c000e5b8>] (ret_from_fork+0x14/0x3c) [ 1.582113] Code: 8a000012 ebfff5a8 e2840054 f57ff05b (e1903f9f) [ 1.588255] ---[ end trace 92921f83f7870ba6 ]--- [ 1.592894] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 1.592894] [ 1.602054] CPU0: stopping [ 1.604771] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G D 3.14.0-rc2-00267-g9398a10 #1 [ 1.613329] [<c001588c>] (unwind_backtrace) from [<c001143c>] (show_stack+0x10/0x14) [ 1.621099] [<c001143c>] (show_stack) from [<c059ab60>] (dump_stack+0x84/0x94) [ 1.628342] [<c059ab60>] (dump_stack) from [<c0014160>] (handle_IPI+0x148/0x174) [ 1.635760] [<c0014160>] (handle_IPI) from [<c00086fc>] (armada_370_xp_handle_irq+0xa8/0x110) [ 1.644309] [<c00086fc>] (armada_370_xp_handle_irq) from [<c0011fc0>] (__irq_svc+0x40/0x50) [ 1.652679] Exception stack(0xc08a5f68 to 0xc08a5fb0) [ 1.657745] 5f60: ffffffed 2d734000 c08ad4e4 00000000 c08ac4cc c08a4000 [ 1.665944] 5f80: c08ac450 c094d64b c05a5128 c08a4000 c094d64b c08a4000 00000000 c08a5fb0 [ 1.674141] 5fa0: c000f158 c0081194 60000113 ffffffff [ 1.679212] [<c0011fc0>] (__irq_svc) from [<c0081194>] (cpu_startup_entry+0x100/0x144) [ 1.687153] [<c0081194>] (cpu_startup_entry) from [<c0823b00>] (start_kernel+0x358/0x364) [ 1.695353] [<c0823b00>] (start_kernel) from [<00008074>] (0x8074) ~$off # PYBOOT: Exception: kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000054 # PYBOOT: Time: 21.79 seconds. # PYBOOT: Result: FAIL mvebu_defconfig --------------- armada-xp-openblocks-ax3-4: FAIL: last 80 lines of boot log: ------------------------------------------------------------

11 years, 3 months

[RFC PATCH 0/3] cpuidle/sched: move main idle function in the idle.c

by Daniel Lezcano

This patchset relies on the "setting the table for integration of cpuidle with the scheduler" from Nicolas Pitre where the idle.c file has been moved into the sched directory. It encapsulate the cpuidle main code into three exported functions which are used by the cpuidle_idle_call function. This one is then moved into the idle.c file. The third patch shows an example on how integrating cpuidle information in the scheduler is easier. Daniel Lezcano (3): cpuidle: split cpuidle_idle_call main function into functions cpuidle: move the cpuidle_idle_call function to idle.c idle: store the idle state index in the struct rq drivers/cpuidle/cpuidle.c | 80 +++++++++++++++++++++++++-------------------- include/linux/cpuidle.h | 9 +++-- kernel/sched/idle.c | 53 ++++++++++++++++++++++++++++++ kernel/sched/sched.h | 3 ++ 4 files changed, 108 insertions(+), 37 deletions(-) -- 1.7.9.5

11 years, 3 months

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