OS and Kernel Details root@ubuntu:~# uname -a Linux ubuntu 2.6.36-rc6+ #16 SMP Sun Oct 3 20:28:16 PDT 2010 i686 GNU/Linux Steps 1. Mounted LogFS file system 2. Ran proprietary file system stress tool 3. Ran sync from other terminal root@ubuntu:~# dmesg -c [ 482.704956] INFO: task sync:2379 blocked for more than 120 seconds. [ 482.706181] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 482.706385] sync D dfa5194c 0 2379 2304 0x00000004 [ 482.706689] dc3d5e70 00000082 c1807684 dfa5194c dc3d5e1c c012b381 dfa5194c dfa51920 [ 482.706847] debf3240 dc3d5e48 c0101c9a debf3240 c06d6640 debf34c4 debf34c8 08aa6c67 [ 482.706865] 00000049 c06d6640 c06d6640 c06d6640 00000000 c06d6640 08aa384a 00000049 [ 482.706951] Call Trace: [ 482.708096] [<c012b381>] ? __dequeue_entity+0x21/0x40 [ 482.708504] [<c0101c9a>] ? __switch_to+0xba/0x170 [ 482.708549] [<c01323d2>] ? enqueue_entity+0xe2/0x400 [ 482.708610] [<c04b3f9d>] schedule_timeout+0x18d/0x260 [ 482.708656] [<c04b3c87>] wait_for_common+0xa7/0x130 [ 482.708672] [<c0136fe0>] ? default_wake_function+0x0/0x10 [ 482.708683] [<c04b3db2>] wait_for_completion+0x12/0x20 [ 482.708696] [<c02087c0>] writeback_inodes_sb+0x90/0xc0 [ 482.708707] [<c020d2ba>] __sync_filesystem+0x4a/0x90 [ 482.708716] [<c020d31a>] sync_one_sb+0x1a/0x20 [ 482.708734] [<c01ed166>] iterate_supers+0x66/0xc0 [ 482.708743] [<c020d300>] ? sync_one_sb+0x0/0x20 [ 482.708752] [<c020d236>] sync_filesystems+0x16/0x20 [ 482.708761] [<c020d331>] sys_sync+0x11/0x40 [ 482.708770] [<c0102e63>] sysenter_do_call+0x12/0x28 [ 505.065326] ------------[ cut here ]------------ [ 505.065375] kernel BUG at fs/logfs/dev_bdev.c:134! [ 505.065435] invalid opcode: 0000 [#1] SMP [ 505.065486] last sysfs file: /sys/devices/pci0000:00/0000:00:10.0/host2/uevent [ 505.065572] Modules linked in: logfs binfmt_misc psmouse serio_raw mptspi mptscsih mptbase pcnet32 mii scsi_transport_spi [ 505.065756] [ 505.065904] Pid: 2245, comm: fs_stress Not tainted 2.6.36-rc6+ #16 440BX Desktop Reference Platform/VMware Virtual Platform [ 505.065936] EIP: 0060:[<e081be6c>] EFLAGS: 00010202 CPU: 0 [ 505.066208] EIP is at bdev_writeseg+0x23c/0x250 [logfs] [ 505.066242] EAX: 40002829 EBX: 00000000 ECX: df86bc00 EDX: c1385160 [ 505.066259] ESI: df86bc00 EDI: cbfe5e80 EBP: dfbf9b4c ESP: dfbf9b18 [ 505.066280] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 505.066320] Process fs_stress (pid: 2245, ti=dfbf8000 task=df9bd7f0 task.ti=dfbf8000) [ 505.066342] Stack: [ 505.066360] 0003b000 dbb33200 dfbcc000 dfbcc018 de9460b0 18ec5000 00000000 00000100 [ 505.066370] <0> 00018ec5 0000003b e081c620 00000000 df113fc0 dfbf9b7c e0819584 0003af5c [ 505.066383] <0> c031a2f9 000050a4 00040000 dbb33200 e081c620 cbfe5100 0000101c 00001000 [ 505.066393] Call Trace: [ 505.066469] [<e0819584>] ? logfs_open_area+0x94/0x150 [logfs] [ 505.066479] [<c031a2f9>] ? find_level+0x49/0xe0 [ 505.066487] [<e0819de3>] ? __logfs_segment_write+0x73/0x1f0 [logfs] [ 505.066496] [<c01b36fe>] ? mempool_kmalloc+0xe/0x10 [ 505.066503] [<e081a0cc>] ? logfs_segment_write+0x16c/0x1b0 [logfs] [ 505.066511] [<e0815948>] ? alloc_shadow+0x48/0xa0 [logfs] [ 505.066518] [<e0816474>] ? logfs_write_i0+0x114/0x170 [logfs] [ 505.066526] [<e08179b6>] ? __logfs_write_rec+0x176/0x2b0 [logfs] [ 505.066534] [<e0817929>] ? __logfs_write_rec+0xe9/0x2b0 [logfs] [ 505.066542] [<e0817b5b>] ? logfs_write_rec+0x6b/0xd0 [logfs] [ 505.066549] [<e0817cbe>] ? __logfs_write_buf+0xfe/0x290 [logfs] [ 505.066562] [<e0817e8b>] ? logfs_write_buf+0x3b/0x60 [logfs] [ 505.066569] [<e0817ecf>] ? indirect_write_block+0x1f/0x40 [logfs] [ 505.066577] [<e08166b3>] ? get_page_reserve+0x63/0xf0 [logfs] [ 505.066584] [<e0811b46>] ? logfs_write_end+0xe6/0x170 [logfs] [ 505.066589] [<c01b09b9>] ? generic_file_buffered_write+0x139/0x1f0 [ 505.066595] [<c01b2ee0>] ? __generic_file_aio_write+0x200/0x510 [ 505.066601] [<c036232f>] ? put_device+0xf/0x20 [ 505.066607] [<c01b3245>] ? generic_file_aio_write+0x55/0xb0 [ 505.066613] [<c01eaa9c>] ? do_sync_write+0x9c/0xd0 [ 505.066621] [<c0142fb5>] ? __do_softirq+0xe5/0x1b0 [ 505.066625] [<c01eabff>] ? rw_verify_area+0x5f/0xe0 [ 505.066630] [<c01ead1a>] ? vfs_write+0x9a/0x170 [ 505.066635] [<c01eaa00>] ? do_sync_write+0x0/0xd0 [ 505.066639] [<c01eb6dd>] ? sys_write+0x3d/0x70 [ 505.066645] [<c0102e63>] ? sysenter_do_call+0x12/0x28 [ 505.066661] Code: 01 00 00 8b 40 04 8b 40 54 8b 80 20 01 00 00 e8 bb e6 ad df 83 c4 28 5b 5e 5f 5d c3 8d 76 00 c7 45 e8 00 01 00 00 e9 3f fe ff ff <0f> 0b eb fe 0f 0b eb fe 0f 0b eb fe 0f 0b eb fe 0f 0b eb fe 55 [ 505.066849] EIP: [<e081be6c>] bdev_writeseg+0x23c/0x250 [logfs] SS:ESP 0068:dfbf9b18 [ 505.067214] ---[ end trace 7abe8bf930ab2cb6 ]--- This is the first time I am sending a mail to FS Development mail alias. Please forgive me if I am not supposed to send this mail here. I kindly request all/someone to please let me know if I should open a bug report in bug tracking system. Thanks a lot for co-operation. Thanks and Regards, Prasad -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
