Hi, this is one of the problems caused by one common mempool for dm-io in kernel when using multiple snapshots. Please try to use kernel 2.6.22, there is new dm-io code and this is fixed. Bug is not related to particular lvm2 tools version. Milan -- mbroz@redhat.com Norbert Phillipps wrote: > Hi all, > > I'm currently running lvm 2.02.25, and device-mapper 1.02.19 on kernel > 2.6.20.13 with Xen 3.1 on Gentoo Linux > > I randomly have kernel panics when creating snapshots and also when > removing snapshots. > > Attached is one of the kernel panics that I have seen while creating a > snapshot. I'm trying to find a stable combination of kernel, lvm, and > Xen version. > > Thanks! > > ------------[ cut here ]------------ > kernel BUG at mm/mempool.c:121! > invalid opcode: 0000 [#1] > SMP > Modules linked in: ipv6 nfs lockd nfs_acl sunrpc bridge llc dm_snapshot > dm_mod aoe qla2xxx i2c_i801 i2c_core firmware_class e1000 uhci_hcd evdev > CPU: 0 > EIP: 0061:[<c013d66b>] Not tainted VLI > EFLAGS: 00010282 (2.6.20.14-xen #5) > EIP is at mempool_resize+0x137/0x16c > eax: ec5a6900 ebx: ffffffe0 ecx: 000000d0 edx: ffffffe0 > esi: e9395b00 edi: f07f5080 ebp: ec5a6900 esp: e8317d5c > ds: 007b es: 007b ss: 0069 > Process vgchange (pid: 8179, ti=e8316000 task=e873da70 task.ti=e8316000) > Stack: 00692000 000000d0 ffffffe0 80000000 ffffffe0 e9395b00 f07f5080 > 00000000 > ee24a3c8 00000000 e8d289c0 ee24a5cd e873da70 c012d034 e8317d94 > e8317d94 > c0156c7e e93962c0 e9395b00 f07f5080 ee06ebf1 f07f5080 e93964c0 > 00000000 > Call Trace: > [<ee24a3c8>] resize_pool+0x47/0xb2 [dm_mod] > [<ee24a5cd>] kcopyd_client_destroy+0x84/0xc9 [dm_mod] > [<c012d034>] autoremove_wake_function+0x0/0x37 > [<c0156c7e>] kfree+0xe/0x7d > [<ee06ebf1>] snapshot_dtr+0x85/0xcf [dm_snapshot] > [<ee246d73>] dm_table_put+0x55/0xbd [dm_mod] > [<ee245b0e>] dm_put+0x6f/0x110 [dm_mod] > [<ee249561>] dev_remove+0x76/0xa4 [dm_mod] > [<ee249b48>] ctl_ioctl+0x1eb/0x255 [dm_mod] > [<c0107457>] monotonic_clock+0x37/0x74 > [<ee2494eb>] dev_remove+0x0/0xa4 [dm_mod] > [<c0164874>] do_ioctl+0x64/0x6d > [<c01648cd>] vfs_ioctl+0x50/0x278 > [<c0164b29>] sys_ioctl+0x34/0x53 > [<c0104c34>] syscall_call+0x7/0xb > [<c0320033>] unix_dgram_sendmsg+0x2f9/0x48a > ======================= > Code: 8b 45 08 3b 45 04 0f 8d 4c ff ff ff 8b 14 24 89 e8 e8 c4 93 1e 00 > 8b 55 10 8b 44 24 04 ff 55 14 89 c3 85 c0 75 bf e9 37 ff ff ff <0f> 0b > eb fe 8b 14 24 89 e8 e8 a1 93 1e 00 8b 55 10 89 d8 ff 55 > EIP: [<c013d66b>] mempool_resize+0x137/0x16c SS:ESP 0069:e8317d5c _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
