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| author | Eric Dumazet <edumazet@google.com> | 2013-09-11 14:24:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:58:50 -0700 |
| commit | 91cf5ab60ff82ecf4550a596867787c1e360dd3f (patch) | |
| tree | bcfba2f74873abc7c59fc2d3c4e5ae27ad4386f7 /fs/eventpoll.c | |
| parent | 8716de383b82f16d920513138f1691e40ef5a9e3 (diff) | |
| download | linux-91cf5ab60ff82ecf4550a596867787c1e360dd3f.tar.gz linux-91cf5ab60ff82ecf4550a596867787c1e360dd3f.tar.bz2 linux-91cf5ab60ff82ecf4550a596867787c1e360dd3f.zip | |
epoll: add a reschedule point in ep_free()
ep_free() might iterate on a huge set of epitems and hold cpu too long.
Add two cond_resched() in order to yield cpu to other tasks. This is safe
as we only hold mutexes in this function.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Theodore Ts'o <tytso@mit.edu>
Acked-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/eventpoll.c')
| -rw-r--r-- | fs/eventpoll.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 293f86741ddb..473e09da7d02 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -740,6 +740,7 @@ static void ep_free(struct eventpoll *ep) epi = rb_entry(rbp, struct epitem, rbn); ep_unregister_pollwait(ep, epi); + cond_resched(); } /* @@ -754,6 +755,7 @@ static void ep_free(struct eventpoll *ep) while ((rbp = rb_first(&ep->rbr)) != NULL) { epi = rb_entry(rbp, struct epitem, rbn); ep_remove(ep, epi); + cond_resched(); } mutex_unlock(&ep->mtx); |