Commit 40bc9a27 authored Jun 10, 2009 by Steven Whitehouse

GFS2: Fix cache coherency between truncate and O_DIRECT read



If a page was partially zeroed as the result of a truncate, then it was
not being correctly marked dirty. This resulted in the deleted data
reappearing if the file was read back via direct I/O.

Reported-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

parent f6d03139

fs/gfs2/bmap.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1012,7 +1012,7 @@ static int gfs2_block_truncate_page(struct address_space *mapping)
		gfs2_trans_add_bh(ip->i_gl, bh, 0);

		zero_user(page, offset, length);

		mark_buffer_dirty(bh);
		unlock:
		unlock_page(page);
		page_cache_release(page);