kernel BUG at fs/ext3/balloc.c:942!
This is a FC2 stock errata kernel 2.6.6-1.435.2.3, roughly equivalent to 2.6.7-rc2. This kernel does contain the bugfix in fs/ext3/file.c (http://marc.theaimsgroup.com/?l=linux-kernel&m=108395053322261&w=2). This only occurs under heavy load, but I can't pinpoint where or how. It must be a race because we cannot reproduce the problem reliably.
Log output attached
If anyone has any insight, please let me know,
Philip Molter
Giganews
Aug 3 17:01:54 h01 kernel: kernel BUG at fs/ext3/balloc.c:942! Aug 3 17:01:54 h01 kernel: invalid operand: 0000 [#1] Aug 3 17:01:54 h01 kernel: SMP Aug 3 17:01:54 h01 kernel: Modules linked in: e1000 bonding ipv6 mii 8021q floppy sg microcode dm_mod uhci_hcd ext3 jbd raid5 xor raid1 3w_xxxx sd_mod scsi_mod Aug 3 17:01:54 h01 kernel: CPU: 1 Aug 3 17:01:54 h01 kernel: EIP: 0060:[<82897d5b>] Not tainted Aug 3 17:01:54 h01 kernel: EFLAGS: 00010287 (2.6.6-1.435.2.3smp) Aug 3 17:01:54 h01 kernel: EIP is at ext3_try_to_allocate_with_rsv+0x119/0x1bc [ext3] Aug 3 17:01:54 h01 kernel: eax: 00520000 ebx: 00518000 ecx: 00518000 edx: 6ec144dc Aug 3 17:01:54 h01 kernel: esi: 00000000 edi: ffffffff ebp: 81f42200 esp: 0415ebf8 Aug 3 17:01:54 h01 kernel: ds: 007b es: 007b ss: 0068 Aug 3 17:01:54 h01 kernel: Process pdflush (pid: 68, threadinfo=0415e000 task=81d5cc70) Aug 3 17:01:54 h01 kernel: Stack: 7b24c100 000000a3 3cdc72cc 00000000 000000a3 000000a3 00002000 81f42200 Aug 3 17:01:54 h01 kernel: 82898049 6f98a14c 00002000 6ec144dc 0415ec58 00000220 6ec144dc 7b248000 Aug 3 17:01:54 h01 kernel: 7b284400 7b26c460 00000000 00000001 6f98a14c 0051a000 6ec14534 3cdc72cc Aug 3 17:01:54 h01 kernel: Call Trace: Aug 3 17:01:54 h01 kernel: [<82898049>] ext3_new_block+0x1ba/0x4aa [ext3] Aug 3 17:01:54 h01 kernel: [<8289a1ab>] ext3_alloc_block+0x9/0xb [ext3] Aug 3 17:01:54 h01 kernel: [<8289a4e1>] ext3_alloc_branch+0x4a/0x232 [ext3] Aug 3 17:01:54 h01 kernel: [<021fdd17>] as_add_request+0xbd/0x179 Aug 3 17:01:54 h01 kernel: [<8289a9fe>] ext3_get_block_handle+0x1c7/0x28e [ext3] Aug 3 17:01:54 h01 kernel: [<8289ab29>] ext3_get_block+0x64/0x6c [ext3] Aug 3 17:01:54 h01 kernel: [<021544c0>] __block_write_full_page+0x107/0x2d0 Aug 3 17:01:54 h01 kernel: [<8289aac5>] ext3_get_block+0x0/0x6c [ext3] Aug 3 17:01:54 h01 kernel: [<0215585f>] block_write_full_page+0xc7/0xd0 Aug 3 17:01:54 h01 kernel: [<8289aac5>] ext3_get_block+0x0/0x6c [ext3] Aug 3 17:01:54 h01 kernel: [<8289b3b3>] ext3_ordered_writepage+0xca/0x136 [ext3] Aug 3 17:01:54 h01 kernel: [<8289b2c9>] bget_one+0x0/0x7 [ext3] Aug 3 17:01:54 h01 kernel: [<0216dda0>] mpage_writepages+0x143/0x273 Aug 3 17:01:54 h01 kernel: [<8289b2e9>] ext3_ordered_writepage+0x0/0x136 [ext3] Aug 3 17:01:54 h01 kernel: [<0216c747>] __sync_single_inode+0x5d/0x19a Aug 3 17:01:54 h01 kernel: [<0216ca9c>] sync_sb_inodes+0x18e/0x242 Aug 3 17:01:54 h01 kernel: [<0213ca16>] pdflush+0x0/0x1e Aug 3 17:01:54 h01 kernel: [<0216cbc9>] writeback_inodes+0x79/0xcd Aug 3 17:01:54 h01 kernel: [<0213c00a>] background_writeout+0x73/0xb5 Aug 3 17:01:54 h01 kernel: [<0213c97a>] __pdflush+0xf6/0x192 Aug 3 17:01:54 h01 kernel: [<0213ca30>] pdflush+0x1a/0x1e Aug 3 17:01:54 h01 kernel: [<0213bf97>] background_writeout+0x0/0xb5 Aug 3 17:01:54 h01 kernel: [<0213ca16>] pdflush+0x0/0x1e Aug 3 17:01:54 h01 kernel: [<0212ff79>] kthread+0x73/0x9b Aug 3 17:01:54 h01 kernel: [<0212ff06>] kthread+0x0/0x9b Aug 3 17:01:54 h01 kernel: [<021051f1>] kernel_thread_helper+0x5/0xb Aug 3 17:01:54 h01 kernel: Aug 3 17:01:54 h01 kernel: Code: 0f 0b ae 03 31 89 8a 82 ff 74 24 2c 89 e8 57 ff 74 24 2c 8b