From: Hugh Dickins <hugh@veritas.com>
Date: Mon, 12 Sep 2005 16:49:24 +0000 (+0200)
Subject: [PATCH] x86-64: Fix idle=poll
X-Git-Tag: v2.6.14-rc1~51
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b8f68e9ffaf5e7c9c463ecd2598cc33f8e6df75e;p=linux-2.6

[PATCH] x86-64: Fix idle=poll

x86_64 idle=poll might be a little less responsive than it should: unlike
mwait_idle, and unlike i386, its poll_idle left TIF_POLLING_NRFLAG set.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c
index b19cee6a12..e9f35c60f8 100644
--- a/arch/x86_64/kernel/process.c
+++ b/arch/x86_64/kernel/process.c
@@ -123,6 +123,7 @@ static void poll_idle (void)
 			: :
 			"i" (_TIF_NEED_RESCHED), 
 			"m" (current_thread_info()->flags));
+		clear_thread_flag(TIF_POLLING_NRFLAG);
 	} else {
 		set_need_resched();
 	}