linux-kernel - Re: [iov_iter] 9bd0e337c6: will-it-scale.per_process

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Message-ID: <98294.1607082708@warthog.procyon.org.uk>
Date:   Fri, 04 Dec 2020 11:51:48 +0000
From:   David Howells <dhowells@...hat.com>
To:     kernel test robot <oliver.sang@...el.com>
Cc:     dhowells@...hat.com, lkp@...ts.01.org, lkp@...el.com,
        ying.huang@...el.com, feng.tang@...el.com, zhengjun.xing@...el.com,
        Pavel Begunkov <asml.silence@...il.com>,
        Matthew Wilcox <willy@...radead.org>,
        Jens Axboe <axboe@...nel.dk>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [iov_iter] 9bd0e337c6: will-it-scale.per_process_ops -4.8% regression

kernel test robot <oliver.sang@...el.com> wrote:

> FYI, we noticed a -4.8% regression of will-it-scale.per_process_ops due to commit:
> 
> 
> commit: 9bd0e337c633aed3e8ec3c7397b7ae0b8436f163 ("[PATCH 01/29] iov_iter: Switch to using a table of operations")

Out of interest, would it be possible for you to run this on the tail of the
series on the same hardware?

Thanks,
David