From: Eric Sandeen Subject: Re: [RFC PATCH] ext4: fix 50% disk write performance regression Date: Mon, 30 Aug 2010 22:29:27 -0500 Message-ID: <4C7C7717.1020704@redhat.com> References: <20100829231126.8d8b2086.billfink@mindspring.com> <20100830174000.GA6647@thunk.org> <20100830164958.edb64c63.bill@wizard.sci.gsfc.nasa.gov> <4C7C1D04.1080205@redhat.com> <20100830194533.6d09c38b.bill@wizard.sci.gsfc.nasa.gov> <4C7C446D.6070602@redhat.com> <20100830210541.8b248a14.billfink@mindspring.com> <4C7C62E9.4090707@redhat.com> <20100830232704.39d2e9f4.billfink@mindspring.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: tytso@mit.edu, bill.fink@nasa.gov, linux-ext4@vger.kernel.org To: Bill Fink Return-path: Received: from mx1.redhat.com ([209.132.183.28]:1026 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932082Ab0HaD3f (ORCPT ); Mon, 30 Aug 2010 23:29:35 -0400 In-Reply-To: <20100830232704.39d2e9f4.billfink@mindspring.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: Bill Fink wrote: > The .0 and .1 files were 0 bytes. There was also a 56 byte .3 file > in each case. Did you also want to see those? nah it's ok I filled it in. I think I see at least 1 thing wrong in the writeback path, I may have a patch for you yet tonight. -Eric