linux-kernel - [PATCH] CFQ: Don't store left slice when slice used up or for a idle workload

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>] [thread-next>] [day] [month] [year] [list]

Message-ID: <4C3BCDA1.5040007@cn.fujitsu.com>
Date:	Tue, 13 Jul 2010 10:21:21 +0800
From:	Gui Jianfeng <guijianfeng@...fujitsu.com>
To:	Jens Axboe <jens.axboe@...cle.com>
CC:	Vivek Goyal <vgoyal@...hat.com>,
	Corrado Zoccolo <czoccolo@...il.com>,
	linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: [PATCH] CFQ: Don't store left slice when slice used up or for a idle
 workload

It doesn't make sence to store left time slice for an idle workload
or for the cfqq that uses up its slice.

Signed-off-by: Gui Jianfeng <guijianfeng@...fujitsu.com>
---
 block/cfq-iosched.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index eb4086f..d985e38 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -3418,7 +3418,7 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
 		 * - when there is a close cooperator
 		 */
 		if (cfq_slice_used(cfqq) || cfq_class_idle(cfqq))
-			cfq_slice_expired(cfqd, 1);
+			cfq_slice_expired(cfqd, 0);
 		else if (sync && cfqq_empty &&
 			 !cfq_close_cooperator(cfqd, cfqq)) {
 			cfqd->noidle_tree_requires_idle |=
-- 
1.5.4.rc3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/