lkml.org 
[lkml]   [2023]   [Apr]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v2] mm: hwpoison: coredump: support recovery from dump_user_range()
From


On 2023/4/27 10:31, HORIGUCHI NAOYA(堀口 直也) wrote:
> On Thu, Apr 27, 2023 at 09:06:46AM +0800, Kefeng Wang wrote:
>>
>>
...
>> For coredump,the task work will be called too, see following code,
>>
>> get_signal
>> sig_kernel_coredump
>> elf_core_dump
>> dump_user_range
>> _copy_from_iter // with MC-safe copy, return without panic
>> do_group_exit(ksig->info.si_signo);
>> do_exit
>> exit_task_work
>> task_work_run
>> kill_me_never
>> memory_failure
>>
>> I also add debug print to check the memory_failure() processing after
>> add MCE_IN_KERNEL_COPYIN to MCE_SAFE exception type, also tested CoW of
>> normal page and huge page, it works too.
>
> Sounds nice to me.
> Maybe this information is worth documenting in the patch description.
>

Sure, will make a formal patch and send out, thanks.

> Thanks,
> Naoya Horiguchi

\
 
 \ /
  Last update: 2023-04-28 10:57    [W:0.072 / U:1.228 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site