From: Matthew Wilcox <willy@infradead.org>
To: Christoph Hellwig <hch@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-aio@kvack.org, io-uring@vger.kernel.org,
linux-kernel@vger.kernel.org, Kanchan Joshi <joshi.k@samsung.com>,
Javier Gonzalez <javier.gonz@samsung.com>
Subject: Re: [PATCH 0/2] Remove kiocb ki_complete
Date: Thu, 9 Jul 2020 12:10:36 +0100 [thread overview]
Message-ID: <20200709111036.GA12769@casper.infradead.org> (raw)
In-Reply-To: <20200709101705.GA2095@infradead.org>
On Thu, Jul 09, 2020 at 11:17:05AM +0100, Christoph Hellwig wrote:
> I really don't like this series at all. If saves a single pointer
> but introduces a complicated machinery that just doesn't follow any
> natural flow. And there doesn't seem to be any good reason for it to
> start with.
Jens doesn't want the kiocb to grow beyond a single cacheline, and we
want the ability to set the loff_t in userspace for an appending write,
so the plan was to replace the ki_complete member in kiocb with an
loff_t __user *ki_posp.
I don't think it's worth worrying about growing kiocb, personally,
but this seemed like the easiest way to make room for a new pointer.
next prev parent reply other threads:[~2020-07-09 11:10 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-08 22:26 [PATCH 0/2] Remove kiocb ki_complete Matthew Wilcox (Oracle)
2020-07-08 22:26 ` [PATCH 1/2] fs: Abstract calling the kiocb completion function Matthew Wilcox (Oracle)
2020-07-08 22:37 ` Jens Axboe
2020-07-08 22:40 ` Matthew Wilcox
2020-07-08 22:50 ` Jens Axboe
2020-07-08 22:26 ` [PATCH 2/2] fs: Remove kiocb->ki_complete Matthew Wilcox (Oracle)
2020-07-08 22:38 ` Jens Axboe
2020-07-09 3:25 ` Jens Axboe
2020-07-09 5:23 ` kernel test robot
2020-07-08 22:33 ` [PATCH 0/2] Remove kiocb ki_complete Jens Axboe
2020-07-09 10:17 ` Christoph Hellwig
2020-07-09 11:10 ` Matthew Wilcox [this message]
2020-07-09 13:26 ` Christoph Hellwig
2020-07-09 13:32 ` Matthew Wilcox
2020-07-09 13:53 ` Jens Axboe
2020-07-09 13:37 ` Pavel Begunkov
2020-07-09 13:43 ` Matthew Wilcox
2020-07-09 13:49 ` Pavel Begunkov
2020-07-09 13:53 ` Matthew Wilcox
2020-07-09 13:59 ` Pavel Begunkov
2020-07-09 13:55 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200709111036.GA12769@casper.infradead.org \
--to=willy@infradead.org \
--cc=axboe@kernel.dk \
--cc=hch@infradead.org \
--cc=io-uring@vger.kernel.org \
--cc=javier.gonz@samsung.com \
--cc=joshi.k@samsung.com \
--cc=linux-aio@kvack.org \
--cc=linux-block@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).