On Wed, Jun 10, 2015 at 3:36 PM, Christoph Hellwig <[email protected]> wrote:
> On Tue, Jun 09, 2015 at 09:49:23PM +0800, Ming Lei wrote:
>> It doesn't make sense to enable merge because the I/O
>> submitted to backing file is handled page by page.
>
> Looks fine, but does it make any difference?
Looks no, see the following result, please:
- iops tested by fio: loop over image on HDD.
patched vs. non-patched
randread 158 161
read 8716 8784
randwrite 6076 5893
write 21896 22066
Thanks,
Ming
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