writeback: Add logging for slow writeback (exceeds sysctl_hung_task_timeout_secs)

Browse source

When a writeback work lasts for sysctl_hung_task_timeout_secs, we want
to identify that there are tasks waiting for a long time-this helps us
pinpoint potential issues.

Additionally, recording the starting jiffies is useful when debugging a
crashed vmcore.

Signed-off-by: Julian Sun <sunjunchao@bytedance.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

...

This commit is contained in:

Julian Sun 2025-09-30 15:18:29 +08:00 • committed by Christian Brauner

parent 1888635532

commit d6e6215907

No known key found for this signature in database

GPG key ID: 91C61BC06578DCA2

2 changed files with 16 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

17

fs/fs-writeback.c

View file

1

include/linux/backing-dev-defs.h

View file