Re: [RFC 0/2] nocopy bvec for direct IO

[Pavel Begunkov]

On 09/12/2020 06:50, Christoph Hellwig wrote:
> On Wed, Dec 09, 2020 at 02:19:50AM +0000, Pavel Begunkov wrote:
>> A benchmark got me 430KIOPS vs 540KIOPS, or +25% on bare metal. And perf
>> shows that bio_iov_iter_get_pages() was taking ~20%. The test is pretty
>> silly, but still imposing. I'll redo it closer to reality for next
>> iteration, anyway need to double check some cases.
> 
> That is pretty impressive.  

The difference will go down with BS=~1-2 pages, just need to to find a
moment to test properly.

> But I only got this cover letter, not the
> actual patches..

Apologies, that goes for everyone as lost CCs in the patches.


-- 
Pavel Begunkov