Re: raid5-cache I/O path improvements

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On Tue, Sep 08, 2015 at 01:02:26PM -0400, Tejun Heo wrote:
> Hello,
> 
> On Tue, Sep 08, 2015 at 09:56:22AM -0700, Shaohua Li wrote:
> > I'll benchmark on a SSD from another vendor, which supports FUA, but FUA
> > write has poor performance in my last test.
> 
> lolwut?  Was it slower than write + flush?

I need double confirm. But for write + flush, we aggregrate several
writes and do a flush; for FUA, we do every meta write with FUA. So this
is not apple to apple comparison.

Thanks,
Shaohua
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