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Commit 88ec2789d856056344161aa20420dd37e893b0fe

Authored by Eric Dumazet 2012-08-21 21:05:14 +0800

Committed by Al Viro 2012-08-22 22:31:05 +0800

Exists in smarc-l5.0.0_1.0.0-ga and in 5 other branches

task_work: add a scheduling point in task_work_run()

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>

Showing 1 changed file with 1 additions and 0 deletions Side-by-side Diff

kernel/task_work.c

kernel/task_work.c

Diff comments View file @ 88ec278

...	...	@@ -75,6 +75,7 @@
75	75	p = q->next;
76	76	q->func(q);
77	77	q = p;
	78	+ cond_resched();
78	79	}
79	80	}
80	81	}