Messages in this thread | | | Date | Wed, 23 Jan 2008 03:12:39 -0800 (PST) | From | Martin Knoblauch <> | Subject | Re: regression: 100% io-wait with 2.6.24-rcX |
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----- Original Message ---- > From: Alasdair G Kergon <agk@redhat.com> > To: Martin Knoblauch <spamtrap@knobisoft.de> > Cc: Linus Torvalds <torvalds@linux-foundation.org>; Mel Gorman <mel@csn.ul.ie>; Fengguang Wu <wfg@mail.ustc.edu.cn>; Mike Snitzer <snitzer@gmail.com>; Peter Zijlstra <peterz@infradead.org>; jplatte@naasa.net; Ingo Molnar <mingo@elte.hu>; linux-kernel@vger.kernel.org; "linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>; James.Bottomley@steeleye.com; Jens Axboe <jens.axboe@oracle.com>; Milan Broz <mbroz@redhat.com>; Neil Brown <neilb@suse.de> > Sent: Wednesday, January 23, 2008 12:40:52 AM > Subject: Re: regression: 100% io-wait with 2.6.24-rcX > > On Tue, Jan 22, 2008 at 07:25:15AM -0800, Martin Knoblauch wrote: > > [root@lpsdm52 ~]# dmsetup table > > VolGroup00-LogVol02: 0 350945280 linear 104:2 67109248 > > VolGroup00-LogVol01: 0 8388608 linear 104:2 418054528 > > VolGroup00-LogVol00: 0 67108864 linear 104:2 384 > > The IO should pass straight through simple linear targets like > that without needing to get broken up, so I wouldn't expect those patches to > make any difference in this particular case. >
Alasdair,
LVM/DM are off the hook :-) I converted one box to direct using partitions and the performance is the same disappointment as with LVM/DM. Thanks anyway for looking at my problem.
I will move the discussion now to a new thread, targetting CCISS directly.
Cheers Martin
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