linux-kernel - Re: [PATCH 01/29] iov_iter: Switch to using a table of operations

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Message-ID: <519190.1606130062@warthog.procyon.org.uk>
Date:   Mon, 23 Nov 2020 11:14:22 +0000
From:   David Howells <dhowells@...hat.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     dhowells@...hat.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: [PATCH 01/29] iov_iter: Switch to using a table of operations

David Howells <dhowells@...hat.com> wrote:

> I tried three different sets of patches: none, just the first (which adds the
> jump table without getting rid of the conditional branches), and all of them.

And, I forgot to mention, I ran each test four times and then interleaved the
result lines for that set.

David