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(parent: a289cec) | patch
task_work: add a scheduling point in task_work_run()
authorEric Dumazet <edumazet@google.com>
Tue, 21 Aug 2012 13:05:14 +0000 (15:05 +0200)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 21 Aug 2012 16:11:44 +0000 (09:11 -0700)
commitfb2f4db7dd89ef69d34eb5e878533e430222045c
treea6e6fedd03fdb923828fa7143a0363738cd7dfcbtree | snapshot
parenta289ceca10b116aa5a1dd159b1105b7001ca8028commit | diff
task_work: add a scheduling point in task_work_run()

It seems commit 60ec07758e57 ("switch fput to task_work_add") re-
introduced the problem addressed in dc12cb9e45c4 ("close_files(): add
scheduling point")

If a server process with a lot of files (say 2 million tcp sockets) is
killed, we can spend a lot of time in task_work_run() and trigger a soft
lockup.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel/task_work.c diff | blob | history
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