From: Theodore Tso Subject: Re: Performance of ext4 Date: Wed, 11 Jun 2008 21:35:09 -0400 Message-ID: <20080612013509.GS8397@mit.edu> References: <20080611135443.GK8397@mit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org, linux-kernel To: Holger Kiehl Return-path: Received: from www.church-of-our-saviour.ORG ([69.25.196.31]:35321 "EHLO thunker.thunk.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754377AbYFLBfN (ORCPT ); Wed, 11 Jun 2008 21:35:13 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On Wed, Jun 11, 2008 at 08:21:50PM +0000, Holger Kiehl wrote: > I think you mean 'small files'? Yes, sorry, I meant "small files". > The test where done with a plain 2.6.25.4, > does that already have barriers enabled? While I did some test I hit this > bug: No, 2.6.25.4 does not have barriers enabled. It's in the latest post-2.6.25.5 git repository (which also has the fix so that barriers=1 doesn't cause an OOPS if you are doing the test on a LVM device which doesn't support barriers). Sorry, I wasnt sure if you were using any of the ext4 patches, and I didn't know whether you were testing on a raw device or an LVM device. - Ted