On 02/07/18 at 08:34pm, Dou Liyang wrote:
At 02/07/2018 08:27 PM, Baoquan He wrote:
On 02/07/18 at 08:17pm, Dou Liyang wrote:
Hi Baoquan,
At 02/07/2018 08:08 PM, Baoquan He wrote:
On 02/07/18 at 08:00pm, Dou Liyang wrote:
Hi Kirill,Mike
At 02/07/2018 06:45 PM, Mike Galbraith wrote:
On Wed, 2018-02-07 at 13:41 +0300, Kirill A. Shutemov wrote: > On Wed, Feb 07, 2018 at 05:25:05PM +0800, Dou Liyang wrote: > > Hi All, > > > > I met the makedumpfile failed in the upstream kernel which contained > > this patch. Did I missed something else? > > None I'm aware of. > > Is there a reason to suspect that the issue is related to the bug this patch > fixed?
I did a contrastive test by my colleagues Indoh's suggestion.
OK, I may get the reason. kaslr is enabled, right? You can try to disable kaslr and try them again. Because phys_base and kaslr_offset are got from vmlinux, while these are generated at compiling time. Just a guess.
Revert your two commits:
commit 83e3c48729d9ebb7af5a31a504f3fd6aff0348c4 Author: Kirill A. Shutemov kirill.shutemov@linux.intel.com Date: Fri Sep 29 17:08:16 2017 +0300
commit 629a359bdb0e0652a8227b4ff3125431995fec6e Author: Kirill A. Shutemov kirill.shutemov@linux.intel.com Date: Tue Nov 7 11:33:37 2017 +0300
...and keep others unchanged, the makedumpfile works well.
Still works fine for me with .today. Box is only 16GB desktop box though.
Btw, In the upstream kernel which contained this patch, I did two tests:
- use the makedumpfile as core_collector in /etc/kdump.conf, then
trigger the process of kdump by echo 1 >/proc/sysrq-trigger, the makedumpfile works well and I can get the vmcore file.
......It is OK
- use cp as core_collector, do the same operation to get the vmcore file.
then use makedumpfile to do like above:
[douly@localhost code]$ ./makedumpfile -d 31 --message-level 31 -xvmlinux_4.15+ vmcore_4.15+_from_cp_command vmcore_4.15+
Oh, then please ignore my previous comment. Adding '-D' can give more debugging message.
I added '-D', Just like before, no more debugging message:
BTW, I use crash to analyze the vmcore file created by 'cp' command.
./crash ../makedumpfile/code/vmcore_4.15+_from_cp_command../makedumpfile/code/vmlinux_4.15+
the crash works well, It's so interesting.
Thanks, dou.
The debugging message with '-D':
And what's the debugging printing when trigger crash by sysrq?
kdump: dump target is /dev/vda2 kdump: saving to /sysroot//var/crash/127.0.0.1-2018-02-07-07:31:56/ [ 2.751352] EXT4-fs (vda2): re-mounted. Opts: data=ordered kdump: saving vmcore-dmesg.txt kdump: saving vmcore-dmesg.txt complete kdump: saving vmcore sadump: does not have partition header sadump: read dump device as unknown format sadump: unknown format LOAD (0) phys_start : 1000000 phys_end : 2a86000 virt_start : ffffffff81000000 virt_end : ffffffff82a86000 LOAD (1) phys_start : 1000 phys_end : 9fc00 virt_start : ffff880000001000 virt_end : ffff88000009fc00 LOAD (2) phys_start : 100000 phys_end : 13000000 virt_start : ffff880000100000 virt_end : ffff880013000000 LOAD (3) phys_start : 33000000 phys_end : 7ffd7000 virt_start : ffff880033000000 virt_end : ffff88007ffd7000 Linux kdump page_size : 4096
max_mapnr : 7ffd7
Buffer size for the cyclic mode: 131061
num of NODEs : 1
Memory type : SPARSEMEM_EX
mem_map (0) mem_map : ffffea0000000000 pfn_start : 0 pfn_end : 8000 mem_map (1) mem_map : ffffea0000200000 pfn_start : 8000 pfn_end : 10000 mem_map (2) mem_map : ffffea0000400000 pfn_start : 10000 pfn_end : 18000 mem_map (3) mem_map : ffffea0000600000 pfn_start : 18000 pfn_end : 20000 mem_map (4) mem_map : ffffea0000800000 pfn_start : 20000 pfn_end : 28000 mem_map (5) mem_map : ffffea0000a00000 pfn_start : 28000 pfn_end : 30000 mem_map (6) mem_map : ffffea0000c00000 pfn_start : 30000 pfn_end : 38000 mem_map (7) mem_map : ffffea0000e00000 pfn_start : 38000 pfn_end : 40000 mem_map (8) mem_map : ffffea0001000000 pfn_start : 40000 pfn_end : 48000 mem_map (9) mem_map : ffffea0001200000 pfn_start : 48000 pfn_end : 50000 mem_map (10) mem_map : ffffea0001400000 pfn_start : 50000 pfn_end : 58000 mem_map (11) mem_map : ffffea0001600000 pfn_start : 58000 pfn_end : 60000 mem_map (12) mem_map : ffffea0001800000 pfn_start : 60000 pfn_end : 68000 mem_map (13) mem_map : ffffea0001a00000 pfn_start : 68000 pfn_end : 70000 mem_map (14) mem_map : ffffea0001c00000 pfn_start : 70000 pfn_end : 78000 mem_map (15) mem_map : ffffea0001e00000 pfn_start : 78000 pfn_end : 7ffd7 mmap() is available on the kernel. Copying data : [100.0 %] - eta: 0s Writing erase info... offset_eraseinfo: 9567fb0, size_eraseinfo: 0 kdump: saving vmcore complete
Thanks, dou
[douly@localhost code]$ ./makedumpfile -D -d 31 --message-level 31 -x vmlinux_4.15+ vmcore_4.15+_from_cp_command vmcore_4.15+ sadump: does not have partition header sadump: read dump device as unknown format sadump: unknown format LOAD (0) phys_start : 1000000 phys_end : 2a86000 virt_start : ffffffff81000000 virt_end : ffffffff82a86000 LOAD (1) phys_start : 1000 phys_end : 9fc00 virt_start : ffff880000001000 virt_end : ffff88000009fc00 LOAD (2) phys_start : 100000 phys_end : 13000000 virt_start : ffff880000100000 virt_end : ffff880013000000 LOAD (3) phys_start : 33000000 phys_end : 7ffd7000 virt_start : ffff880033000000 virt_end : ffff88007ffd7000 Linux kdump page_size : 4096
max_mapnr : 7ffd7
Buffer size for the cyclic mode: 131061 The kernel version is not supported. The makedumpfile operation may be incomplete.
num of NODEs : 1
Memory type : SPARSEMEM_EX
mem_map (0) mem_map : ffff88007ff26000 pfn_start : 0 pfn_end : 8000 mem_map (1) mem_map : 0 pfn_start : 8000 pfn_end : 10000 mem_map (2) mem_map : 0 pfn_start : 10000 pfn_end : 18000 mem_map (3) mem_map : 0 pfn_start : 18000 pfn_end : 20000 mem_map (4) mem_map : 0 pfn_start : 20000 pfn_end : 28000 mem_map (5) mem_map : 0 pfn_start : 28000 pfn_end : 30000 mem_map (6) mem_map : 0 pfn_start : 30000 pfn_end : 38000 mem_map (7) mem_map : 0 pfn_start : 38000 pfn_end : 40000 mem_map (8) mem_map : 0 pfn_start : 40000 pfn_end : 48000 mem_map (9) mem_map : 0 pfn_start : 48000 pfn_end : 50000 mem_map (10) mem_map : 0 pfn_start : 50000 pfn_end : 58000 mem_map (11) mem_map : 0 pfn_start : 58000 pfn_end : 60000 mem_map (12) mem_map : 0 pfn_start : 60000 pfn_end : 68000 mem_map (13) mem_map : 0 pfn_start : 68000 pfn_end : 70000 mem_map (14) mem_map : 0 pfn_start : 70000 pfn_end : 78000 mem_map (15) mem_map : 0 pfn_start : 78000 pfn_end : 7ffd7 mmap() is available on the kernel. Checking for memory holes : [100.0 %] | STEP [Checking for memory holes ] : 0.000014 seconds __vtop4_x86_64: Can't get a valid pte. readmem: Can't convert a virtual address(ffff88007ffd7000) to physical address. readmem: type_addr: 0, addr:ffff88007ffd7000, size:32768 __exclude_unnecessary_pages: Can't read the buffer of struct page. create_2nd_bitmap: Can't exclude unnecessary pages. Checking for memory holes : [100.0 %] \ STEP [Checking for memory holes ] : 0.000006 seconds Checking for memory holes : [100.0 %] - STEP [Checking for memory holes ] : 0.000004 seconds __vtop4_x86_64: Can't get a valid pte. readmem: Can't convert a virtual address(ffff88007ffd7000) to physical address. readmem: type_addr: 0, addr:ffff88007ffd7000, size:32768 __exclude_unnecessary_pages: Can't read the buffer of struct page. create_2nd_bitmap: Can't exclude unnecessary pages.
makedumpfile Failed.
......It causes makedumpfile failed.Thanks, dou.
-Mike