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Date: Tue, 3 Nov 2009 05:06:45 -0500 From: Christoph Hellwig <hch@...radead.org> To: device-mapper development <dm-devel@...hat.com> Cc: Laurent CORBES <laurent.corbes@...rtjog.com>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org Subject: Re: [dm-devel] Re: Ext3 sequential read performance drop 2.6.29 -> 2.6.30,2.6.31,... On Mon, Nov 02, 2009 at 01:55:54PM -0800, Andrew Morton wrote: > On Tue, 13 Oct 2009 12:09:55 +0200 > Laurent CORBES <laurent.corbes@...rtjog.com> wrote: > > > Hi all, > > > > While benchmarking some systems I discover a big sequential read performance > > drop using ext3 on ~ big files. The drop seems to be introduced in 2.6.30. I'm > > testing with 2.6.28.6 -> 2.6.29.6 -> 2.6.30.4 -> 2.6.31.3. > > Seems that large performance regressions aren't of interest to this > list :( No sure which list you mean, but dm-devel is for dm, not md. We're also seeing similarly massive performance drops with md and ext3/xfs as already reported on the list. Someone tracked it down to writeback changes as usual, but there it got stuck. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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