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task_work: add a scheduling point in task_work_run()

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It seems commit 4a9d4b02 (switch fput to task_work_add) reintroduced
the problem addressed in commit 944be0b2 (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>
This commit is contained in:
Eric Dumazet 2012-08-21 15:05:14 +02:00 committed by Al Viro
parent 55852635a8
commit 88ec2789d8
1 changed files with 1 additions and 0 deletions
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kernel/task_work.c
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@ -75,6 +75,7 @@ void task_work_run(void)
p = q->next;
q->func(q);
q = p;
cond_resched();
}
}
}