linux-ext4 - Re: [PATCH RFC] Insure direct IO writes do not use the page cache

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Date:	Wed, 29 Jul 2009 12:41:40 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Curt Wohlgemuth <curtw@...gle.com>
CC:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH RFC] Insure direct IO writes do not use the page cache

Eric Sandeen wrote:

...

> I haven't replied to the first mail yet because I have a lot of
> remembering to do about xfs first, but I'm fairly certain that at least
> your use of blockdev_direct_IO_own_locking() is not correct.  See for
> example all the comments around __blockdev_direct_IO about i_mutex, and
> all the xfs_ilock/xfs_iolock calls in xfs_read/xfs_write.

Oh and i_alloc_sem too, forgot about that one :)

-Eric
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