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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>
This commit is contained in:
Steven Whitehouse 2009-06-10 09:09:40 +01:00
parent f6d03139d7
commit 40bc9a27e0
1 changed files with 1 additions and 1 deletions
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2
fs/gfs2/bmap.c
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@ -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);