Messages in this thread | | | From | Justin TerAvest <> | Date | Thu, 18 Aug 2011 13:22:22 -0700 | Subject | Re: cfq-iosched: a regression |
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Hi Shaohua,
What was the workload you were running to find this regression?
On Mon, Aug 15, 2011 at 7:47 PM, Shaohua Li <shaohua.li@intel.com> wrote: > We have a kernel build regression since 3.1-rc1, which is about 10% > regression. The kernel source is in an ext3 filesystem. > Alex Shi bisect it to commit: > commit a07405b7802691d29ab3b23bdc76ee6d006aad0b > Author: Justin TerAvest <teravest@google.com> > Date: Sun Jul 10 22:09:19 2011 +0200 > > cfq: Remove special treatment for metadata rqs. > > Apparently this is caused by lack metadata preemption, where ext3/ext4 > do use READ_META. I didn't see a way to fix the issue, so suggest > reverting the patch. > > Reported-by: Alex Shi<alex.shi@intel.com> > Reported-by: Shaohua Li<shaohua.li@intel.com> > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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