Re: Performance degradation in IO writes vs. reads (was scsi-mq V2)

From: Sagi Grimberg
Date: Sun Aug 24 2014 - 12:42:28 EST

On 8/21/2014 5:02 PM, Sagi Grimberg wrote:
On 8/21/2014 4:03 PM, Christoph Hellwig wrote:
On Thu, Aug 21, 2014 at 03:32:09PM +0300, Sagi Grimberg wrote:
So I just got back to checking this issue of *extremely low* IO write
performance I got in 3.16-rc2.

Please test with 3.16 final. There once issue each in aio and dio
that caused bad I/O performance regression that were only fixed last
minute in the 3.16 cycle.

I'll do that now.

Indeed this issue is resolved in 3.16. Sorry for the false alarm...
Thanks Christoph.

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