From: Christoph Hellwig <hch@infradead.org>
To: Stan Hoeppner <stan@hardwarefreak.com>
Cc: xfs@oss.sgi.com
Subject: Re: NOW: o_direct -- WAS: Re: WARNING in xfs_lwr.c, xfs_write()
Date: Thu, 27 May 2010 07:47:37 -0400 [thread overview]
Message-ID: <20100527114736.GA13112@infradead.org> (raw)
In-Reply-To: <4BFD3926.6040208@hardwarefreak.com>
O_DIRECT is not a Posix standard and not very portable. It originated
on IRIX, and Linux inherited it during the 2.4 kernel series days.
These days FreeBSD/NetBSD and AIX support it as well, but for example
Solaris, HP-UX and OpenBSD don't, nevermind Windows or Mac OS.
I have no idea why the MTAs don't want to use it - it's generally easier
to use then memory mapped I/O, and has much more deterministic
performance.
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next prev parent reply other threads:[~2010-05-27 11:45 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 [this message]
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
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