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From: Kirill Korotaev <dev@openvz.org>
To: Andrew Morton <akpm@osdl.org>, Linus Torvalds <torvalds@osdl.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [PATCH] Reduce sched latency in shrink_dcache_sb()
Date: Thu, 09 Mar 2006 20:26:47 +0300	[thread overview]
Message-ID: <44106557.5010004@openvz.org> (raw)

[-- Attachment #1: Type: text/plain, Size: 342 bytes --]

This patch reduces scheduling latency in shrink_dcache_sb()
noticed during remounting of big partitions with many cached dentries.
The same latency fix was applied to select_parent() long ago.

Signed-Off-By: Denis Lunev <den@sw.ru>
Signed-Off-By: Pavel Emelianov <xemul@sw.ru>
Signed-Off-By: Kirill Korotaev <dev@openvz.org>

Thanks,
Kirill

[-- Attachment #2: diff-ms-shrink-dcache-latency2 --]
[-- Type: text/plain, Size: 273 bytes --]

--- ./fs/dcache.c.lat	2006-03-09 16:03:44.000000000 +0300
+++ ./fs/dcache.c	2006-03-09 20:19:41.000000000 +0300
@@ -491,6 +491,7 @@ repeat:
 			continue;
 		}
 		prune_one_dentry(dentry);
+		cond_resched_lock(&dcache_lock);
 		goto repeat;
 	}
 	spin_unlock(&dcache_lock);

                 reply	other threads:[~2006-03-09 17:22 UTC|newest]

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