From: Joel Becker <Joel.Becker@oracle.com>
To: Karthik Sarangan <karthiks@cdac.in>
Cc: linux-kernel@vger.kernel.org
Subject: Re: O_DIRECT for block device
Date: Thu, 22 Sep 2005 01:40:36 -0700 [thread overview]
Message-ID: <20050922084036.GI27375@ca-server1.us.oracle.com> (raw)
In-Reply-To: <4332697C.7070409@cdac.in>
On Thu, Sep 22, 2005 at 01:51:16PM +0530, Karthik Sarangan wrote:
> open("/dev/sdb", O_DIRECT) succeeds.
> A 'read' or 'write' returns -1 and errno is EINVAL.
You must align your buffer to at least sector size. See
posix_memalign(3).
--
Life's Little Instruction Book #30
"Never buy a house without a fireplace."
Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker@oracle.com
Phone: (650) 506-8127
next prev parent reply other threads:[~2005-09-22 8:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-22 8:21 O_DIRECT for block device Karthik Sarangan
2005-09-22 8:34 ` Avi Kivity
2005-09-22 8:40 ` Joel Becker [this message]
[not found] ` <43329590.3050006@cdac.in>
[not found] ` <20050922152028.GJ27375@ca-server1.us.oracle.com>
2005-09-23 5:36 ` Karthik Sarangan
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