From: Andi Kleen <andi@firstfloor.org>
To: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>,
Andi Kleen <andi@firstfloor.org>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [patch][v2] swap: virtual swap readahead
Date: Wed, 3 Jun 2009 17:02:42 +0200 [thread overview]
Message-ID: <20090603150242.GB1065@one.firstfloor.org> (raw)
In-Reply-To: <4A268DF8.6000701@redhat.com>
> I'm not too worried about not walking the page tables,
> because swap is an extreme slow path anyway.
it was more about taking less locks and doing less mappings.
Especially highmem pte mappings can be quite expensive, because
they have to flush parts of the TLB.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
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next prev parent reply other threads:[~2009-06-03 14:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-02 22:37 Johannes Weiner
2009-06-02 23:34 ` Andi Kleen
2009-06-03 13:27 ` Johannes Weiner
2009-06-03 14:51 ` Rik van Riel
2009-06-03 15:02 ` Andi Kleen [this message]
2009-06-05 11:03 ` Minchan Kim
2009-06-04 1:46 ` KAMEZAWA Hiroyuki
2009-06-04 10:04 ` Johannes Weiner
2009-06-07 17:55 ` Hugh Dickins
2009-06-08 15:21 ` Johannes Weiner
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