From: Andi Kleen <andi@firstfloor.org>
To: Don Mullis <don.mullis@gmail.com>
Cc: linux-kernel@vger.kernel.org, airlied@redhat.com,
andi@firstfloor.org, david@fromorbit.com, dedekind@infradead.org
Subject: Re: [PATCH 1/2] lib: more scalable list_sort()
Date: Thu, 21 Jan 2010 18:59:14 +0100 [thread overview]
Message-ID: <20100121175914.GA8910@basil.fritz.box> (raw)
In-Reply-To: <87fx609i29.fsf@gmail.com>
On Wed, Jan 20, 2010 at 08:51:26PM -0800, Don Mullis wrote:
> The use of list_sort() by UBIFS looks like it could generate long
> lists; this alternative implementation scales better, reaching ~3x
> performance gain as list length approaches the L2 cache size.
If this can really be called with long lists
the function likely needs (optional) need_resched()s
Otherwise it could ruin scheduling latencies.
-Andi
next prev parent reply other threads:[~2010-01-21 17:59 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-21 4:51 [PATCH 1/2] lib: more scalable list_sort() Don Mullis
2010-01-21 5:17 ` [PATCH 2/2] lib: revise list_sort() comment Don Mullis
2010-01-21 19:11 ` Olaf Titz
2010-01-22 4:54 ` Don Mullis
2010-01-21 9:22 ` [PATCH 1/2] lib: more scalable list_sort() Artem Bityutskiy
2010-01-21 9:54 ` Dave Chinner
2010-01-21 11:44 ` Artem Bityutskiy
2010-01-21 16:34 ` Don Mullis
2010-01-21 17:59 ` Andi Kleen [this message]
2010-01-22 3:17 ` Don Mullis
2010-01-22 10:43 ` Andi Kleen
2010-01-22 12:29 ` Artem Bityutskiy
2010-01-22 17:55 ` Don Mullis
2010-01-23 8:28 ` Dave Chinner
2010-01-23 11:35 ` Andi Kleen
2010-01-23 16:05 ` Dave Chinner
2010-01-24 20:59 ` Andi Kleen
2010-01-24 21:10 ` Artem Bityutskiy
2010-01-24 22:38 ` Don Mullis
2010-01-25 3:41 ` Dave Chinner
2010-08-04 14:04 ` Artem Bityutskiy
2010-08-07 7:50 ` Artem Bityutskiy
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