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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: Al Viro <viro@zeniv.linux.org.uk>,
	Pavel Begunkov <asml.silence@gmail.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [git pull] iov_iter fixes
Date: Fri, 10 Sep 2021 10:31:00 -0700	[thread overview]
Message-ID: <CAHk-=wjWQtXmtOK9nMdM68CKavejv=p-0B81WazbjxaD-e3JXw@mail.gmail.com> (raw)
In-Reply-To: <b1944570-0e72-fd64-a453-45f17e7c1e56@kernel.dk>

On Fri, Sep 10, 2021 at 10:26 AM Jens Axboe <axboe@kernel.dk> wrote:
>
> On 9/10/21 10:58 AM, Linus Torvalds wrote:
> > On Fri, Sep 10, 2021 at 9:56 AM Al Viro <viro@zeniv.linux.org.uk> wrote:
> >>
> >> What's the point of all those contortions, anyway?  You only need it for
> >> iovec case; don't mix doing that and turning it into flavour-independent
> >> primitive.
> >
> > Good point, making it specific to iovec only gets rid of a lot of
> > special cases and worries.
> >
> > This is fairly specialized, no need to always cater to every possible case.
>
> Alright, split into three patches:
>
> https://git.kernel.dk/cgit/linux-block/log/?h=iov_iter

That looks sane to me.

Please add some comment about how that

        i->iov -= state->nr_segs - i->nr_segs;

actually is the right thing for all the three cases (iow how 'iov',
'kvec' and 'bvec' all end up having a union member that acts the same
way).

But yeah, I like how the io_uring.c code looks better this way too.

Al, what do you think?

              Linus

  reply	other threads:[~2021-09-10 17:31 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-09  4:22 [git pull] iov_iter fixes Al Viro
2021-09-09 19:37 ` Linus Torvalds
2021-09-09 21:19   ` Jens Axboe
2021-09-09 21:39     ` Jens Axboe
2021-09-09 21:56       ` Linus Torvalds
2021-09-09 22:21         ` Jens Axboe
2021-09-09 22:56           ` Linus Torvalds
2021-09-10  1:35             ` Jens Axboe
2021-09-10  2:43               ` Jens Axboe
2021-09-10  2:48               ` Al Viro
2021-09-10  3:06                 ` Jens Axboe
2021-09-10  3:15                   ` Al Viro
2021-09-10  3:23                     ` Jens Axboe
2021-09-10  3:24                     ` Al Viro
2021-09-10  3:28                       ` Jens Axboe
2021-09-13 15:29                 ` David Laight
2021-09-09 21:42     ` Dave Chinner
2021-09-10  2:57     ` Al Viro
2021-09-10  3:05       ` Jens Axboe
2021-09-10  3:11         ` Al Viro
2021-09-10  3:22           ` Jens Axboe
2021-09-10  3:27             ` Al Viro
2021-09-10  3:30               ` Jens Axboe
2021-09-10  3:36                 ` Al Viro
2021-09-10 13:57                   ` Jens Axboe
2021-09-10 14:42                     ` Al Viro
2021-09-10 15:08                       ` Jens Axboe
2021-09-10 15:32                         ` Al Viro
2021-09-10 15:36                           ` Jens Axboe
2021-09-10 15:04                     ` Jens Axboe
2021-09-10 16:06                       ` Jens Axboe
2021-09-10 16:44                         ` Linus Torvalds
2021-09-10 16:56                         ` Al Viro
2021-09-10 16:58                           ` Linus Torvalds
2021-09-10 17:26                             ` Jens Axboe
2021-09-10 17:31                               ` Linus Torvalds [this message]
2021-09-10 17:32                                 ` Jens Axboe
2021-09-10 18:48                                 ` Al Viro
2021-09-10 19:04                                   ` Linus Torvalds
2021-09-10 19:10                                     ` Linus Torvalds
2021-09-10 19:10                                   ` Jens Axboe
2021-09-10 17:04                           ` Jens Axboe
2021-09-09 22:54   ` Pavel Begunkov
2021-09-09 22:57     ` Pavel Begunkov
2021-09-09 23:14   ` Pavel Begunkov
2021-09-09 20:03 ` pr-tracker-bot

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