Re: avoid calling nth_page in the block I/O path

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On 4/8/19 4:46 AM, Christoph Hellwig wrote:
> Hi Jens,
> 
> you complained about the overhead of calling nth_page in the multipage
> bio_vec enabled I/O path a while ago.  While I can't really reproduce
> the numbers on my (slower) hardware we could avoid the nth_page calls
> pretty easily with a few tweaks.  Can you take a look at this series?

While I haven't had a chance to bench this yet, I like this series
just as an improvement/cleanup.

-- 
Jens Axboe




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