I got this BUG when attempting to use merged patchset of Mike's and Jon's patches (from http://people.redhat.com/msnitzer/patches/snapshot-merge/kernel_unified/2.6.31/) I think we shouldn't join these two patchsets together. I mean, before clustered patches, merging was stable (I reviewed and tested it and except for one userspace bug (already fixed) there were no flaws) ... now it doesn't work. I would recommend to leave merging as it was (i.e. stable, apply only little patches on it) and develop Jon's clustering on the top of merging and not interleave it with merging, so that the clustering patches could be rolled back if problems were found. When clustering will be stable and reviewed, it could be added to the kernel --- but it may happen later than merging, so don't mix it. Mikulas kernel BUG at drivers/md/dm-snap-persistent.c:498! \|/ ____ \|/ "@'/ .. \`@" /_| \__/ |_\ \__U_/ kcopyd(3648): Kernel bad sw trap 5 [#1] TSTATE: 0000008080001604 TPC: 0000000010077cd4 TNPC: 0000000010077cd8 Y: 00000000 Not tainted TPC: <persistent_commit_merge+0xf4/0x120 [dm_snapshot]> g0: 0000000000000000 g1: 0000000000000000 g2: 0000000000000000 g3: 0000000000000001 g4: fffff8003f335100 g5: 0000000000000000 g6: fffff8003baa0000 g7: 00000000006d76c0 o0: 0000000000000036 o1: 0000000010079848 o2: 00000000000001f2 o3: 0000000000000000 o4: 0000000000000001 o5: 0000000000000000 sp: fffff8003baa31b1 ret_pc: 0000000010077ccc RPC: <persistent_commit_merge+0xec/0x120 [dm_snapshot]> l0: 0000000100384390 l1: fffff8003f77ea60 l2: 0000000000000000 l3: ff00000000000000 l4: 0000000000000000 l5: 0000000000000000 l6: 0000000000000000 l7: 00000000f7d21000 i0: 0000000000000000 i1: 000000000000003a i2: fffff8003f588140 i3: 0000000000000000 i4: 0000000000000000 i5: 0000000000000000 i6: fffff8003baa3271 i7: 0000000010074ee4 I7: <merge_callback+0xa4/0x140 [dm_snapshot]> Disabling lock debugging due to kernel taint Caller[0000000010074ee4]: merge_callback+0xa4/0x140 [dm_snapshot] Caller[00000000100533dc]: run_complete_job+0x3c/0x80 [dm_mod] Caller[000000001005300c]: process_jobs+0x8c/0x180 [dm_mod] Caller[0000000010053118]: do_work+0x18/0x60 [dm_mod] Caller[0000000000466ad4]: worker_thread+0x134/0x220 Caller[000000000046b180]: kthread+0x60/0x80 Caller[000000000042b4b0]: kernel_thread+0x30/0x60 Caller[000000000046b070]: kthreadd+0xf0/0x1a0 Instruction DUMP: 921021f2 7c0ec8cd 90122048 <91d02005> 110401e6 92102371 7c0ec8c8 90122048 91d02005 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
