xfs: don't zero partial page cache pages during O_DIRECT writes
authorDave Chinner <dchinner@redhat.com>
Tue, 2 Sep 2014 02:12:52 +0000 (12:12 +1000)
committerDave Chinner <david@fromorbit.com>
Tue, 2 Sep 2014 02:12:52 +0000 (12:12 +1000)
commit834ffca6f7e345a79f6f2e2d131b0dfba8a4b67a
tree631b63149957d4f4a1711520b9f4e0f4401c218b
parent85e584da3212140ee80fd047f9058bbee0bc00d5
xfs: don't zero partial page cache pages during O_DIRECT writes

Similar to direct IO reads, direct IO writes are using
truncate_pagecache_range to invalidate the page cache. This is
incorrect due to the sub-block zeroing in the page cache that
truncate_pagecache_range() triggers.

This patch fixes things by using invalidate_inode_pages2_range
instead.  It preserves the page cache invalidation, but won't zero
any pages.

cc: stable@vger.kernel.org
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
fs/xfs/xfs_file.c