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Re: [dm-devel] high iowait problem(Bug 12309 on bugzilla.kernel.org)
- From: "Martin K. Petersen" <martin petersen oracle com>
- To: Andrew Morton <akpm linux-foundation org>
- Cc: Frank Ren <frankrq2009 gmx com>, "a.p.zijlstra" <a p zijlstra chello nl>, "Martin K. Petersen" <martin petersen oracle com>, linux-kernel vger kernel org, dm-devel redhat com, "jens.axboe" <jens axboe oracle com>, mingo <mingo elte hu>, stable kernel org, Alasdair G Kergon <agk redhat com>
- Subject: Re: [dm-devel] high iowait problem(Bug 12309 on bugzilla.kernel.org)
- Date: Wed, 14 Apr 2010 10:25:08 -0400
>>>>> "Andrew" == Andrew Morton <akpm linux-foundation org> writes:
Andrew> I'm seeing just one device-mapper change whcih went in over that
Andrew> timeframe:
Andrew> : commit e0f5cfa7c18b411634e73923841eccd3a4c0ce7f
Andrew> : Author: Martin K. Petersen <martin petersen oracle com>
Andrew> : Date: Mon Jan 11 03:21:50 2010 -0500
Andrew> :
Andrew> : DM: Fix device mapper topology stacking
The topology changes do not modify anything in our runtime I/O path.
They only come into play during filesystem or logical volume creation on
top of devices that support reporting alignment/physical block size.
And you need recent dm and filesystem utilities for that to work.
--
Martin K. Petersen Oracle Linux Engineering
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