Messages in this thread | | | Date | Mon, 26 Jul 2010 09:54:11 -0400 | From | Vivek Goyal <> | Subject | Re: [RFC PATCH] cfq-iosched: IOPS mode for group scheduling and new group_idle tunable |
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On Mon, Jul 26, 2010 at 09:48:18AM -0400, Christoph Hellwig wrote: > On Mon, Jul 26, 2010 at 09:43:29AM -0400, Vivek Goyal wrote: > > > Don't know if this is related, but I'm not quite shure if XFS (which I use > > > exclusively) uses the jbd/jbd2 journaling layer at all. > > > > I also don't know. But because this patch is making a difference with your > > XFS file system performance, may be it does use. > > > > CCing Christoph, he can tell us. > > No, of course XFS doesn't use jbd.
Hmm.., interesting. So somewhere WRITE_SYNC idling in CFQ is hurting XFS performance also. This time for some other reason and not jbd/jbd2.
Vivek
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