From: Stewart Smith <stewart@flamingspork.com>
To: Stan Hoeppner <stan@hardwarefreak.com>, xfs@oss.sgi.com
Subject: Re: WARNING in xfs_lwr.c, xfs_write()
Date: Mon, 24 May 2010 15:16:58 +1000 [thread overview]
Message-ID: <87r5l1ev5h.fsf@willster.local.flamingspork.com> (raw)
In-Reply-To: <4BF9FCA8.8090906@hardwarefreak.com>
On Sun, 23 May 2010 23:12:24 -0500, Stan Hoeppner <stan@hardwarefreak.com> wrote:
> "The whole notion of "direct IO" is totally braindamaged. Just say no.
>
> This is your brain: O
> This is your brain on O_DIRECT: .
>
> Any questions?"
>
>
> Linus
>
> From: http://lkml.org/lkml/2007/1/10/235
and the alternative is......
\0
(null).
We can have very explicit knowledge about buffers and IO in
userspace. Much better than you are ever going to have guessing it in
kernel IO paths. There currently exists *no* usable and reliable way of
transmitting this information to the kernel other than O_DIRECT.
--
Stewart Smith
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
next prev parent reply other threads:[~2010-05-24 5:14 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-23 5:20 WARNING in xfs_lwr.c, xfs_write() Roman Kononov
2010-05-23 5:20 ` Roman Kononov
2010-05-23 10:18 ` Dave Chinner
2010-05-23 10:18 ` Dave Chinner
2010-05-23 14:23 ` Roman Kononov
2010-05-23 14:23 ` Roman Kononov
2010-05-24 1:19 ` Dave Chinner
2010-05-24 1:19 ` Dave Chinner
2010-06-12 5:00 ` Ilia Mirkin
2010-06-12 5:00 ` Ilia Mirkin
2010-06-13 22:47 ` Dave Chinner
2010-06-13 22:47 ` Dave Chinner
2010-06-13 23:10 ` Ilia Mirkin
2010-06-13 23:10 ` Ilia Mirkin
2010-06-14 1:29 ` Dave Chinner
2010-06-14 1:29 ` Dave Chinner
2010-06-14 3:27 ` Ilia Mirkin
2010-06-14 3:27 ` Ilia Mirkin
2010-06-14 15:11 ` Roman Kononov
2010-06-14 15:11 ` Roman Kononov
2010-05-24 4:12 ` Stan Hoeppner
2010-05-24 5:16 ` Stewart Smith [this message]
2010-05-24 19:34 ` Roman Kononov
2010-05-26 7:06 ` Dave Chinner
2010-05-26 15:07 ` NOW: o_direct -- WAS: " Stan Hoeppner
2010-05-27 11:05 ` Michael Monnerie
2010-05-27 11:47 ` Christoph Hellwig
2010-05-27 13:58 ` Stewart Smith
2010-05-27 14:57 ` Christoph Hellwig
2010-05-27 15:45 ` Stewart Smith
2010-05-28 0:25 ` Stan Hoeppner
2010-05-27 14:05 ` Stewart Smith
2010-05-28 0:42 ` Stan Hoeppner
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=87r5l1ev5h.fsf@willster.local.flamingspork.com \
--to=stewart@flamingspork.com \
--cc=stan@hardwarefreak.com \
--cc=xfs@oss.sgi.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.