From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id E68A06B0082 for ; Wed, 3 Jun 2009 10:55:36 -0400 (EDT) Date: Wed, 3 Jun 2009 17:02:42 +0200 From: Andi Kleen Subject: Re: [patch][v2] swap: virtual swap readahead Message-ID: <20090603150242.GB1065@one.firstfloor.org> References: <20090602223738.GA15475@cmpxchg.org> <20090602233457.GY1065@one.firstfloor.org> <20090603132751.GA1813@cmpxchg.org> <4A268DF8.6000701@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4A268DF8.6000701@redhat.com> Sender: owner-linux-mm@kvack.org To: Rik van Riel Cc: Johannes Weiner , Andi Kleen , Andrew Morton , Peter Zijlstra , Hugh Dickins , linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: > 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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org