diff options
| author | Milan Broz <mbroz@redhat.com> | 2012-03-07 19:09:37 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-03-12 12:31:41 -0700 |
| commit | 6cfee3190217a11b1566e2fa6fe9d05c12146f4f (patch) | |
| tree | 7a1eac23b56c18502630c1dbc4c60f17b52ea992 /drivers/xen/balloon.c | |
| parent | e2ece17aceb773d9be4f0eb75f7f7360bcf06259 (diff) | |
dm io: fix discard support
commit 0c535e0d6f463365c29623350dbd91642363c39b upstream.
This patch fixes a crash by recognising discards in dm_io.
Currently dm_mirror can send REQ_DISCARD bios if running over a
discard-enabled device and without support in dm_io the system
crashes badly.
BUG: unable to handle kernel paging request at 00800000
IP: __bio_add_page.part.17+0xf5/0x1e0
...
bio_add_page+0x56/0x70
dispatch_io+0x1cf/0x240 [dm_mod]
? km_get_page+0x50/0x50 [dm_mod]
? vm_next_page+0x20/0x20 [dm_mod]
? mirror_flush+0x130/0x130 [dm_mirror]
dm_io+0xdc/0x2b0 [dm_mod]
...
Introduced in 2.6.38-rc1 by commit 5fc2ffeabb9ee0fc0e71ff16b49f34f0ed3d05b4
(dm raid1: support discard).
Signed-off-by: Milan Broz <mbroz@redhat.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/xen/balloon.c')
0 files changed, 0 insertions, 0 deletions