linaro-kernel

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10094 discussions

[ACTIVITY][weekly][linaro] (Dave Martin) 2011-01-09 - 2011-01-13

by Dave Martin

== Dave Martin <dmart> == === Activity Summary === * Porting the switcher to the GNU tools. Mostly complete with some help from nico. Still needs tidy-up, and getting the final link working still needs more work (however, we may be able to dodge around that initially. Getting it perfect would be a waste of effort, since this is of no relevance to the linux kernel). === Plans === * Finish merging the switcher patches together * Get hold of the fast model and try to run the switcher. Then when it fails, debug. * Possibly post driver changes to replace NO_IRQ with a test compatible with the "0 means no irq" convention. * Sync with Deepak, Pawel etc. about what needs to be done for the remaining DT bits (bindings, drivers) === Work Items === no update === Absences === none planned yet

13 years, 3 months

[ACTIVITY] (Shawn Guo) Week of Jan 9

by Shawn Guo

=== Device Tree === * Start looking at the DT support for imx audio driver. The first step would be consolidating SSI driver between PowerPC family and i.MX family. Since the hardware IP is basically the same one for PowerPC and i.MX, it does not make sense to Tabi Timur (PowerPC SSI developer from Freescale) that we keep forking the driver for these two architecture, so he NAK-ed the patch adding DT probe support into i.MX SSI driver. Instead, he requested to make the PowerPC one work for i.MX, since the DT support is already there. But that is a much bigger effort than simply adding DT probe based on imx SSI driver, and will need to take some time. * After an extensive discussion with Stephen Warren and Aisheng on pinctrl DT binding, we are approaching some level of agreement. Stephen came up a draft proposal based on the discussion, which should work at least for imx and tegra. === imx6 maintenance === * Tested BSYM usage fixing series from Rob Herring on imx6q * Tested smp_twd runtime registration series from Marc Zyngier on imx6q * Reviewed the second version of audio board level changes and imx-dma driver fix-up series from Richard Zhao * Sent a patch to add missing twd_clk for imx6q clock, and I queued this one for 3.3-rc series. === mxs maintenance === * Reviewed a apx4devkit saif board level fixing from Lauri Hintsala * Helped on a couple mx28 fec clock queries === Misc === * Sent v2 of patch common/image.c to align usage of fdt_high with initrd_high to update fdt_high documentation and fix an issue with 0xffffffff case. === Vacation === * 2 weeks (Jan 23 and Jan 30) China Spring Festival Holiday (Will try to check email from time to time though) -- Regards, Shawn

13 years, 3 months

[ACTIVITY] (Saugata Das) Jan 2nd-13th

by Saugata Das

== Saugata Das sdas == === Activity Summary === * Data tag patch pushed to mmc-next * Debug session together with Venkat for the BKOPS issue * Context ID patch prepared. Internal review ongoing === Plans === * Testing of context ID patch on Samsung eMMC === Issues === * None

13 years, 3 months

[ACTIVITY] (John Stultz) Jan 9th-13th

by john stultz

=== Highlights === * Got buy in from Brian & Arve on my alternative monotonic evdev input timestamp patch. Resent to input list and maintainer. Still haven't heard anything back from maintainer about merging it or not. I suspect this will end up having to wait for 3.4 * Worked to get the Android sub-team wiki page started up. https://wiki.linaro.org/WorkingGroups/Kernel/AndroidUpstreaming * Synced with Rafael about his wakelock/pm_stay_awake migration plan. Likely a good candidate for alarmtimer interface testing. * Ran the weekly Android sub-team meeting (over email) with Anton. * Andrew Morton pushed my merge_config.sh script for merging. Unfortunately it was sent to the kbuild maintainer and not to Linus, so its unlikely to make it in for 3.3. The patch still is pending in -mm. * Synced with Andrey, Nico and Deepak on Linaro kernel transition * Reposted merge_config.sh script and sent it to Andrey for inclusion into the linaro kernel. Looking to try to handle inconsistent config issue which has been causing trouble recently. * Tried to push 2 RTC fixes as well as some timekeeping cleanup patches to Thomas for inclusion in 3.3. So far no response, so I've pinged tglx again. * Looked into lockdep warning I was getting with fadvise volatile implementation. After spending a bit of time, I couldn't sort it out and tried to see how ashmem avoids it. Ends up ashmem trips the same lockdep warning and calling vmtruncate_range from a shrinker is the problem. Not yet sure how to avoid this yet, but decided to table it for now. * Started work on a range-tree algorithm for better managing the volatile page ranges used with the fadvise volatile mapping alternative to ashmem. Got some reasonable progress on an initial userspace algorithm. I feel like I'm back in college (zig-zig/zig-zag/what?). === Plans === * Continue working on range-tree algorithm, trying to add self-balancing to the tree. If that gets finished, try to integrate it into the kernel & my fadvise code. * Ping kbuild maintainer about merge_config.sh patch status * Send out alarmtimer rework to greg & android devs for review === Issues ==== * Tried to provide some workarounds for sched_clock issues that are cropping up on arm. Likely we need to add a middle-to-largeish work-item for someone in Linaro to fix the generic sched_clock implementation, as I suspect it isn't going to just go away. Unfortunately I don't have enough time to dig in on it right now.

13 years, 3 months

[Activity] (Omar Ramirez) 2011-12-26 2012-01-13

by Omar Ramirez Luna

== Omar Ramirez <omarrmz> == === Highlights === * Patches for iommu hwmod for OMAP seem to have settled down on the comments, no changes requested yet, collecting Acks. Side investigation of omap isp clocks spawned from this series. * Discussions with Ohad and feedback on rpmsg and remoteproc against other standards like MCAPI. Still syncing on the work to be done, currently working on side items surrounding remoteproc. === Plans === * Look at omap-mailbox and omap-iommu for device tree conversion. * Plan for a clean version of rpmsg code outside the kernel, decoupled of TI sysbios code, currently marked as a nice-to-have priority. === Travel/Time Off ===. * Outside of U.S. and waiting for new Visa (since 12/22/11). * Time off (for Visa application) 12/19/11 - 12/23/11

13 years, 3 months

[ACTIVITY] (Anton Vorontsov) 2011-12-26 - 2012-01-13

by Anton Vorontsov

OK, still can't manage to make it weekly stuff, but for now the main reason for this is a somewhat disturbing long holidays (which I used as my vacation); so, this status report actually covers just this week (except Monday, which was a holiday as well). == Community contributions == * Some work for power supply tree. Managed to review charger manager and TI LP8727 drivers. This is now all in mainline via this pull request; http://lkml.org/lkml/2012/1/10/514 * Sent a small missing patch for Android lowmemorykiller (well, I thought that I sent it two days earlier, but for some reason it did not get past my local MTA. But Greg says that it still has chances to slip into 3.3); http://lkml.org/lkml/2012/1/13/251 == Completed Work Items == * Performed some lowmemorykiller behaviour tests regarding how it handles full file cache conditions (as suggested by KOSAKI Motohiro), and there are indeed some problems: it starts killing processes even if there is plenty of file cache (read free memory). Well, it also might be "intentional", as rereading data from slow medium might be a bad idea, and since we don't have much control what exactly file cache contains, it might be better to kill unneeded tasks (and free guaranteed amount of memory), then just reclaim random memory from the cache; * Apart from testing latest mainstream kernel and ensuring that the new staging code does work, nothing much has been done. == Plans == * Continue work on current lowmemorykiller, i.e. further work on file cache issue, think about a better strategy. Investigate whether we could get rid of tasklist_lock; * Update blueprints; * Finally pick over other patches that need upstreaming. -- Anton Vorontsov Email: cbouatmailru(a)gmail.com

13 years, 3 months

[ACTIVITY] (Anton Vorontsov) 2011-12-26 - 2012-01-13

by Anton Vorontsov

13 years, 3 months

[PATCH] staging: android: lowmemorykiller: Don't wait more than one second for a process to die

by Anton Vorontsov

From: Arve Hjønnevåg <arve(a)android.com> If a process forked and the child process was killed by the lowmemorykiller, the lowmemory killer would be disabled until the parent process reaped the child or it died itself. Signed-off-by: Arve Hjønnevåg <arve(a)android.com> Signed-off-by: Anton Vorontsov <anton.vorontsov(a)linaro.org> --- Noticed that the patch is missing. Any reason for not wanting it in staging? drivers/staging/android/lowmemorykiller.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git a/drivers/staging/android/lowmemorykiller.c b/drivers/staging/android/lowmemorykiller.c index 2d8d2b7..efc7dc1 100644 --- a/drivers/staging/android/lowmemorykiller.c +++ b/drivers/staging/android/lowmemorykiller.c @@ -54,6 +54,7 @@ static size_t lowmem_minfree[6] = { static int lowmem_minfree_size = 4; static struct task_struct *lowmem_deathpending; +static unsigned long lowmem_deathpending_timeout; #define lowmem_print(level, x...) \ do { \ @@ -103,7 +104,8 @@ static int lowmem_shrink(struct shrinker *s, struct shrink_control *sc) * Note: Currently you need CONFIG_PROFILING * for this to work correctly. */ - if (lowmem_deathpending) + if (lowmem_deathpending && + time_before_eq(jiffies, lowmem_deathpending_timeout)) return 0; if (lowmem_adj_size < array_size) @@ -178,6 +180,7 @@ static int lowmem_shrink(struct shrinker *s, struct shrink_control *sc) */ #ifdef CONFIG_PROFILING lowmem_deathpending = selected; + lowmem_deathpending_timeout = jiffies + HZ; task_handoff_register(&task_nb); #endif force_sig(SIGKILL, selected); -- 1.7.7.3

13 years, 3 months

[ACTIVITY][weekly][linaro] (Dave Martin) 2011-01-09 - 2011-01-13

by Dave Martin

13 years, 3 months

[ACTIVITY] (Linus Walleij) 2011-12-17 - 2012-01-13

by Linus Walleij

== Linus Walleij linusw == === Highlights === * Torvalds accepted and pulled in the 31 patches that were accumulated for pin control last kernel cycle. * Bug fixes for various ux500 Daniel Lezcano (PM) on linux-next were applied by Russell and pulled into the mainline tree with the other ARM patches. * Fixed a build bug in SA1100 caused by the new dynamic clksrc stuff. (Found in kisskb.) * Updating Blueprints and such administrativa. * Merged the PXA pin control (muxing only) driver by Haoijan, it's a real nice driver and good example for others. * Ux500 mainlining since too little is happening: - Prepared a set of PRCMU update patches. - Helping our ALSA SoC authors to get started to get their stuff upstream. * Signed GPG keys for Sjur Brændeland and Henrik Rydberg (the input/touch maintainer). === Plans === * New pin config table patch due ASAP. I am working on this. There is a per-pin and per-group configuration call but this does not suffice: developers want tables of configurations to be handled by the pin controller core as well. * Various pinctrl patches being applied and discussed among them dummy pinmuxes akin to dummy regulators, we need to see if this is a good idea or not. * Prepare conference presentations for Android builders and Embedded Linux Conference. * Drive generalization of Nomadik GPIO by using the pinctrl framework. drivers/gpio/gpio-nomadik.c * Test the PL08x patches on the Ericsson Research PB11MPCore and submit platform data for using pl08x DMA on that platform. * Look into other Ux500 stuff in need of mainlining... like - Ux500 clocks - the HWMON stuff. === Issues === * Nobody is mainlining Ux500, and being a subarch maintainer I feel bad about not being able to do much about it due to time shortage. This is creating problems for others since core functionality is missing which makes other subsystems suffer and other stuff cannot be mainlined. :-( Thanks, Linus Walleij

13 years, 3 months

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