| commit | 2bd023452592e5f5cf90dd426cc39b7632b15b76 | [log] [tgz] |
|---|---|---|
| author | Mikulas Patocka <mpatocka@redhat.com> | Mon Jun 22 10:12:26 2009 +0100 |
| committer | Alasdair G Kergon <agk@redhat.com> | Mon Jun 22 10:12:26 2009 +0100 |
| tree | 62fe4d816c597e1b6c58bf150603dd72c9ce6135 | |
| parent | 51aa322849581f1a73594e48ea0df63f914ee6a2 [diff] |
dm snapshot: use barrier when writing exception store Send barrier requests when updating the exception area. Exception area updates need to be ordered w.r.t. data writes, so that the writes are not reordered in hardware disk cache. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>