From: Stewart Smith <stewart@flamingspork.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Stan Hoeppner <stan@hardwarefreak.com>, xfs@oss.sgi.com
Subject: Re: NOW: o_direct -- WAS: Re: WARNING in xfs_lwr.c, xfs_write()
Date: Fri, 28 May 2010 01:45:14 +1000 [thread overview]
Message-ID: <877hmpjqlx.fsf@willster.local.flamingspork.com> (raw)
In-Reply-To: <20100527145714.GA28678@infradead.org>
On Thu, 27 May 2010 10:57:14 -0400, Christoph Hellwig <hch@infradead.org> wrote:
> On Thu, May 27, 2010 at 11:58:55PM +1000, Stewart Smith wrote:
> > There is O_DIRECT type functionality available on Windows, with similar
> > restrictions for aligned IO too. You have to use the Win32 APIs to do it
> > though, the POSIX ones won't get you it (or more than 2048 files open at
> > once).
> >
> > In practice we've only ever found Solaris (other than linux) to be
> > reliable with O_DIRECT (at least on UFS... ZFS is... well... I wouldn't
> > run a database server on it yet).
>
> Solaris doesn't support O_DIRECT either, it instead has a separate
> directio call - just another pointless difference.
Oh yeah, casually forgot about that. Shows how much I'm writing new code
on Solaris that is IO performance critical (on Solaris).
--
Stewart Smith
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next prev parent reply other threads:[~2010-05-27 15:42 UTC|newest]
Thread overview: 23+ 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 10:18 ` Dave Chinner
2010-05-23 14:23 ` Roman Kononov
2010-05-24 1:19 ` Dave Chinner
2010-06-12 5:00 ` Ilia Mirkin
2010-06-13 22:47 ` Dave Chinner
2010-06-13 23:10 ` Ilia Mirkin
2010-06-14 1:29 ` Dave Chinner
2010-06-14 3:27 ` Ilia Mirkin
2010-06-14 15:11 ` Roman Kononov
2010-05-24 4:12 ` Stan Hoeppner
2010-05-24 5:16 ` Stewart Smith
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 [this message]
2010-05-28 0:25 ` Stan Hoeppner
2010-05-27 14:05 ` Stewart Smith
2010-05-28 0:42 ` Stan Hoeppner
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