From: David Rientjes <rientjes@google.com>
To: Joonsoo Kim <js1304@gmail.com>
Cc: akpm@linux-foundation.org, Pekka Enberg <penberg@kernel.org>,
Christoph Lameter <cl@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] mm: don't invoke __alloc_pages_direct_compact when order 0
Date: Sat, 7 Jul 2012 01:40:23 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1207070139510.10445@chino.kir.corp.google.com> (raw)
In-Reply-To: <1341588521-17744-1-git-send-email-js1304@gmail.com>
On Sat, 7 Jul 2012, Joonsoo Kim wrote:
> __alloc_pages_direct_compact has many arguments so invoking it is very costly.
> And in almost invoking case, order is 0, so return immediately.
>
If "zero cost" is "very costly", then this might make sense.
__alloc_pages_direct_compact() is inlined by gcc.
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next prev parent reply other threads:[~2012-07-07 8:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-06 15:28 Joonsoo Kim
2012-07-06 15:59 ` Minchan Kim
2012-07-06 16:58 ` JoonSoo Kim
2012-07-07 0:38 ` Minchan Kim
2012-07-08 2:29 ` JoonSoo Kim
2012-07-07 8:40 ` David Rientjes [this message]
2012-07-08 2:33 ` JoonSoo Kim
2012-07-08 22:53 ` David Rientjes
2012-07-09 14:13 ` JoonSoo Kim
2012-07-09 21:10 ` David Rientjes
2012-07-09 22:41 ` Andrew Morton
2012-07-10 10:47 ` Mel Gorman
2012-07-10 15:24 ` JoonSoo Kim
2012-07-10 15:48 ` Mel Gorman
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