lkml.org 
[lkml]   [2023]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v3] softlockup: serialized softlockup's log
Hi,

On Thu, Nov 23, 2023 at 12:41 AM <lizhe.67@bytedance.com> wrote:
>
> From: Li Zhe <lizhe.67@bytedance.com>
>
> If multiple CPUs trigger softlockup at the same time with
> 'softlockup_all_cpu_backtrace=0', the softlockup's logs will appear
> staggeredly in dmesg, which will affect the viewing of the logs for
> developer. Since the code path for outputting softlockup logs is not
> a kernel hotspot and the performance requirements for the code are
> not strict, locks are used to serialize the softlockup log output to
> improve the readability of the logs.
>
> Signed-off-by: Li Zhe <lizhe.67@bytedance.com>
> ---
> Changelogs:
>
> v1->v2:
> - define the lock outside the scope of function
> - add precondition 'softlockup_all_cpu_backtrace=0' in commit message
>
> v2->v3:
> - define the lock inside the scope of function
>
> kernel/watchdog.c | 3 +++
> 1 file changed, 3 insertions(+)

Reviewed-by: Douglas Anderson <dianders@chromium.org>

\
 
 \ /
  Last update: 2023-11-27 22:49    [W:0.057 / U:0.536 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site