Re: [iov_iter] 9bd0e337c6: will-it-scale.per_process_ops -4.8% regression

[Jens Axboe]

On 12/3/20 10:47 AM, Linus Torvalds wrote:
> On Wed, Dec 2, 2020 at 10:31 PM kernel test robot <oliver.sang@xxxxxxxxx> wrote:
>>
>> FYI, we noticed a -4.8% regression of will-it-scale.per_process_ops due to commit:
> 
> Ok, I guess that's bigger than expected, but the profile data does
> show how bad the indirect branches are.

It's also in the same range (3-6%) as the microbenchmarks I ran and posted.
So at least there's correlation there too.

-- 
Jens Axboe