On Fri, Nov 25 2011 at 2:28pm -0500, Milan Broz <mbroz@xxxxxxxxxx> wrote: > This patch adds support for discard request to dm_io interface. > > Currently dm_mirror can send REQ_DISCARD bios if running over > 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] > ... > > Signed-off-by: Milan Broz <mbroz@xxxxxxxxxx> Acked-by: Mike Snitzer <snitzer@xxxxxxxxxx> -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
