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(parent: 574d2ec) | 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)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 22 Aug 2012 14:31:05 +0000 (10:31 -0400)
commita423400399d6f27b1ce59b148c5790d7643e2d56
tree0e944baca39ae432b11ca105fa5c8d0cdd6a47a5tree | snapshot
parent574d2ecec58796ea95fbe93aecf2b5c3208f1a6ccommit | diff
task_work: add a scheduling point in task_work_run()

It seems commit 60ec0775 (switch fput to task_work_add) reintroduced
the problem addressed in commit dc12cb9e (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: Al Viro <viro@zeniv.linux.org.uk>
kernel/task_work.c diff | blob | history
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