linux-ext4 - Re: [PATCH 21/26] ext4: Remove wait for unwritten extent conversion from ext4

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Message-ID: <20130604183059.GL3030@thunk.org>
Date:	Tue, 4 Jun 2013 14:30:59 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 21/26] ext4: Remove wait for unwritten extent conversion
 from ext4_truncate()

On Fri, May 31, 2013 at 11:42:54AM +0200, Jan Kara wrote:
> Since PageWriteback bit is now cleared after extents are converted from
> unwritten to written ones, we have full exclusion of writeback path from
> truncate (truncate_inode_pages() waits for PageWriteback bits to get cleared
> on all invalidated pages). Exclusion from DIO path is achieved by
> inode_dio_wait() call in ext4_setattr(). So there's no need to wait for
> extent convertion in ext4_truncate() anymore.
> 
> Reviewed-by: Zheng Liu <wenqing.lz@...bao.com>
> Signed-off-by: Jan Kara <jack@...e.cz>

Thanks, applied.

							- Ted
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