http://oss.sgi.com/bugzilla/show_bug.cgi?id=400
Summary: lvm2 snapshots?
Product: Linux XFS
Version: Current
Platform: IA32
OS/Version: Linux
Status: NEW
Severity: normal
Priority: High
Component: XFS kernel code
AssignedTo: xfs-master@xxxxxxxxxxx
ReportedBy: walter@xxxxxxx
We run linux 2.6.11.6 with LVM2 and XFS. We try to use snapshots to do nightly
backups.
The error message is:
Mar 29 14:04:26 fs kernel: Access to block zero: fs: <dm-4> inode: 529201100
start_block : 0 start_off : 0 blkcnt : 0
extent-state : 0
Mar 29 14:04:26 fs kernel: ------------[ cut here ]------------
Mar 29 14:04:26 fs kernel: kernel BUG at fs/xfs/support/debug.c:106!
Mar 29 14:04:26 fs kernel: invalid operand: 0000 [#1]
Mar 29 14:04:26 fs kernel: SMP
Mar 29 14:04:26 fs kernel: Modules linked in: ide_cd cdrom siimage piix e1000
qla2300 qla2xxx scsi_transport_fc dm_sna
pshot dm_mod
Mar 29 14:04:26 fs kernel: CPU: 0
Mar 29 14:04:26 fs kernel: EIP: 0060:[<c024e85b>] Not tainted VLI
Mar 29 14:04:26 fs kernel: EFLAGS: 00010246 (2.6.11.6-sara1)
Mar 29 14:04:26 fs kernel: EIP is at cmn_err+0xab/0xc0
Mar 29 14:04:26 fs kernel: eax: 00000000 ebx: c0363b40 ecx: 00000001 edx:
00000293
Mar 29 14:04:26 fs kernel: esi: 00000000 edi: c0476d00 ebp: e0ac9814 esp:
e0ac97f4
Mar 29 14:04:26 fs kernel: ds: 007b es: 007b ss: 0068
Mar 29 14:04:26 fs kernel: Process dsmc (pid: 13791, threadinfo=e0ac8000
task=ed7ca530)
Mar 29 14:04:26 fs kernel: Stack: c0353ef6 c035a3b0 c0476d00 00000293 00000000
00000000 00000000 e0ac9974
Mar 29 14:04:26 fs kernel: e0ac9858 c01f73cc 00000000 c0363b40 f71102e0 1f8af7cc
00000000 00000000
Mar 29 14:04:26 fs kernel: 00000000 00000000 00000000 00000000 00000000 00000000
e0ac9974 023caf60
Mar 29 14:04:26 fs kernel: Call Trace:
Mar 29 14:04:26 fs kernel: [<c010354f>] show_stack+0x7f/0xa0
Mar 29 14:04:26 fs kernel: [<c01036ff>] show_registers+0x15f/0x1d0
Mar 29 14:04:26 fs kernel: [<c0103924>] die+0xf4/0x180
Mar 29 14:04:26 fs kernel: [<c0103ddc>] do_invalid_op+0xbc/0xd0
Mar 29 14:04:26 fs kernel: [<c01031bb>] error_code+0x2b/0x30
Mar 29 14:04:26 fs kernel: [<c01f73cc>] xfs_bmap_search_extents+0xfc/0x120
Mar 29 14:04:26 fs kernel: [<c01f88be>] xfs_bmapi+0x26e/0x15f0
Mar 29 14:04:26 fs kernel: [<c022361e>] xfs_iomap+0x16e/0x4b0
Mar 29 14:04:26 fs kernel: [<c0244ae0>] __linvfs_get_block+0x90/0x2b0
Mar 29 14:04:26 fs kernel: [<c0244d42>] linvfs_get_block+0x42/0x50
Mar 29 14:04:26 fs kernel: [<c0175fe6>] do_mpage_readpage+0x1b6/0x4e0
Mar 29 14:04:26 fs kernel: [<c0176449>] mpage_readpages+0x139/0x160
Mar 29 14:04:26 fs kernel: [<c013a226>] read_pages+0x126/0x130
Mar 29 14:04:26 fs kernel: [<c013a322>] __do_page_cache_readahead+0xf2/0x150
Mar 29 14:04:26 fs kernel: [<c013a554>] blockable_page_cache_readahead+0x64/0x80
Mar 29 14:04:26 fs kernel: [<c013a6cf>] page_cache_readahead+0x15f/0x2d0
Mar 29 14:04:26 fs kernel: [<c0133ba8>] do_generic_mapping_read+0x578/0x590
Mar 29 14:04:26 fs kernel: [<c0133ead>] __generic_file_aio_read+0x1ed/0x220
Mar 29 14:04:26 fs kernel: [<c024b0b0>] xfs_read+0x130/0x300
Mar 29 14:04:26 fs kernel: [<c02478be>] linvfs_aio_read+0x8e/0xa0
Mar 29 14:04:26 fs kernel: [<c01521f3>] do_sync_read+0xa3/0xd0
Mar 29 14:04:26 fs kernel: [<c01522d0>] vfs_read+0xb0/0x130
Mar 29 14:04:26 fs kernel: [<c015259b>] sys_read+0x4b/0x80
Mar 29 14:04:26 fs kernel: [<c0102717>] syscall_call+0x7/0xb
Mar 29 14:04:26 fs kernel: Code: 89 54 24 08 8b 55 f0 8b 04 95 a0 3f 3a c0 89 44
24 04 e8 d9 88 ec ff 8b 55 ec b8 84 3
f 3a c0 e8 3c 3f 0f 00 8b 45 f0 85 c0 75 08 <0f> 0b 6a 00 cc a3 35 c0 83 c4 14
5b 5e 5f 5d c3 90 8d 74 26 00
I figured that maybe this happens because we don't use xfs_freeze. For some
reason, xfs_freeze freezes the filesystem so good that lvcreate -s does not
work either (hangs until you unfreeze manually).
We are running on linux 2.6.11.6 with LVM2 and XFS.
lvm2 utilities are version 2.01.04
xfsprogs are version 2.6.20
Greets,
--Walter
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