From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 1 Feb 2011 23:52:35 +0000 (-0800)
Subject: epoll: epoll_wait() should not use timespec_add_ns()
X-Git-Tag: v2.6.37.1~89
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=168adf93380bada1eefaca8dee29556faf3a0986;p=pandora-kernel.git

epoll: epoll_wait() should not use timespec_add_ns()

commit 0781b909b5586f4db720b5d1838b78f9d8e42f14 upstream.

commit 95aac7b1cd224f ("epoll: make epoll_wait() use the hrtimer range
feature") added a performance regression because it uses timespec_add_ns()
with potential very large 'ns' values.

[akpm@linux-foundation.org: s/epoll_set_mstimeout/ep_set_mstimeout/, per Davide]
Reported-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Shawn Bohrer <shawn.bohrer@gmail.com>
Acked-by: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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