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(parent: 60bbbaa) | 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)
commitdeb309dd5295c5bc6682ea2a0bf50cd310f843bd
treea6e6fedd03fdb923828fa7143a0363738cd7dfcbtree | snapshot
parent60bbbaa6074f29316f7324b2b1aa88d0f4297001commit | diff
task_work: add a scheduling point in task_work_run()

It seems commit 4841eadc1714 ("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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