linux-kernel - [PATCH 4/5] sched_fair.c: remove branch hint

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <4B0BBBB1.2050100@klingt.org>
Date:	Tue, 24 Nov 2009 11:55:45 +0100
From:	Tim Blechmann <tim@...ngt.org>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH 4/5] sched_fair.c: remove branch hint

branch hint profiling of my nehalem machine, showed 90% incorrect
branch hints:

15728471 158903754  90 pick_next_task_fair            sched_fair.c
   1555

Signed-off-by: Tim Blechmann <tim@...ngt.org>
---
 kernel/sched_fair.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index e5945df..5a0965c 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1552,7 +1552,7 @@ static struct task_struct
*pick_next_task_fair(struct rq *rq)
 	struct cfs_rq *cfs_rq = &rq->cfs;
 	struct sched_entity *se;
 -	if (unlikely(!cfs_rq->nr_running))
+	if (!cfs_rq->nr_running)
 		return NULL;
  	do {
-- 
1.6.4.2



Download attachment "signature.asc" of type "application/pgp-signature" (198 bytes)