xfs: don't zero partial page cache pages during O_DIRECT writes

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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>

...

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Dave Chinner 2014-09-02 12:12:52 +10:00 • committed by Dave Chinner

parent 85e584da32

commit 834ffca6f7

1 changed files with 9 additions and 1 deletions

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fs/xfs/xfs_file.c

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