Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759860AbXIMJFW (ORCPT ); Thu, 13 Sep 2007 05:05:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755673AbXIMJFI (ORCPT ); Thu, 13 Sep 2007 05:05:08 -0400 Received: from smtp108.mail.mud.yahoo.com ([209.191.85.218]:30636 "HELO smtp108.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752771AbXIMJFG (ORCPT ); Thu, 13 Sep 2007 05:05:06 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:X-YMail-OSG:From:To:Subject:Date:User-Agent:Cc:References:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-Disposition:Message-Id; b=4dq1IKSwG/+TBHbe0X68hzIH8sjJyLSFDYcmnR0RJ9ynwByNCk80TnSwo7jzI6N43ASYgKlOcJHeXJ3/H8QlPULGct3SyRe65ri6XRLfuKFN112HoX+HJ2UC4LIpcE717bY0MV1GhfsmAscLdSvqfR7CVK0zm7e+BDQRSjn5DhE= ; X-YMail-OSG: smVmK_UVM1kuCC7DmILhAIXNCT0fZSv_xQQ9VbAiw0ONfEYX6Ke8yQEAfXriJtE_0x64JLmiLA-- From: Nick Piggin To: David Chinner Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support) Date: Thu, 13 Sep 2007 03:23:21 +1000 User-Agent: KMail/1.9.5 Cc: Mel Gorman , Christoph Lameter , andrea@suse.de, torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Christoph Hellwig , William Lee Irwin III , Jens Axboe , Badari Pulavarty , Maxim Levitsky , Fengguang Wu , swin wang , totty.lu@gmail.com, hugh@veritas.com, joern@lazybastard.org References: <20070911060349.993975297@sgi.com> <200709120127.33832.nickpiggin@yahoo.com.au> <20070913014905.GV995458@sgi.com> In-Reply-To: <20070913014905.GV995458@sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200709130323.22534.nickpiggin@yahoo.com.au> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 888 Lines: 19 On Thursday 13 September 2007 11:49, David Chinner wrote: > On Wed, Sep 12, 2007 at 01:27:33AM +1000, Nick Piggin wrote: > > I just gave 4 things which combined might easily reduce xfs vmap overhead > > by several orders of magnitude, all without changing much code at all. > > Patches would be greatly appreciately. You obviously understand this > vm code much better than I do, so if it's easy to fix by adding some > generic vmap cache thingy, please do. Well, it may not be easy to _fix_, but it's easy to try a few improvements ;) How do I make an image and run a workload that will coerce XFS into doing a significant number of vmaps? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/