linux-ext4 - Re: [PATCH] ext4: hole-punch use truncate_pagecache

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Date:	Fri, 1 Jun 2012 00:17:42 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Christoph Hellwig <hch@...radead.org>, linux-ext4@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] ext4: hole-punch use truncate_pagecache_range

On Sun, May 13, 2012 at 01:47:00PM -0700, Hugh Dickins wrote:
> When truncating a file, we unmap pages from userspace first, as that's
> usually more efficient than relying, page by page, on the fallback in
> truncate_inode_page() - particularly if the file is mapped many times.
> 
> Do the same when punching a hole: 3.4 added truncate_pagecache_range()
> to do the unmap and trunc, so use it in ext4_ext_punch_hole(), instead
> of calling truncate_inode_pages_range() directly.
> 
> Signed-off-by: Hugh Dickins <hughd@...gle.com>

Applied, thanks.

					- Ted
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