On Mon, Dec 15 2008, Alexander Beregalov wrote: > Hi > > [ 22.857720] scsi_scan_0 used greatest stack depth: 4864 bytes left > [ 22.859221] scsi 1:0:0:0: CD-ROM HL-DT-ST CD-ROM GCR-8240N 1.10 PQ > : 0 ANSI: 5 > [ 23.077531] ------------[ cut here ]------------ > [ 23.080733] kernel BUG at block/cfq-iosched.c:1243! > [ 23.080733] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC > [ 23.080733] last sysfs file: > [ 23.080733] CPU 3 > [ 23.080733] Modules linked in: > [ 23.080733] Pid: 580, comm: scsi_scan_0 Tainted: G W 2.6.28-rc8-next- > 20081215 #98 > [ 23.080733] RIP: 0010:[<ffffffff80371160>] [<ffffffff80371160>] cic_free_fun > c+0x18/0x88 > [ 23.080733] RSP: 0018:ffff88007ce9fe40 EFLAGS: 00010246 > [ 23.080733] RAX: ffff88007ceb6618 RBX: ffff88007cf1d680 RCX: 0000000000000001 > [ 23.080733] RDX: 0000000000000001 RSI: ffff88007cf1d680 RDI: ffff88007cea6000 > [ 23.080733] RBP: ffff88007ce9fe60 R08: 0000000000000246 R09: 0000000000000001 > [ 23.080733] R10: ffff88007ce9fde0 R11: ffff88007f0489c0 R12: ffff88007cea6000 > [ 23.080733] R13: ffff88007ce9ff00 R14: ffff88007cc49568 R15: ffff88007cc49568 > [ 23.080733] FS: 0000000000000000(0000) GS:ffff88007f402a28(0000) knlGS:00000 > 00000000000 > [ 23.080733] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b > [ 23.080733] CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000006e0 > [ 23.080733] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [ 23.080733] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > [ 23.080733] Process scsi_scan_0 (pid: 580, threadinfo ffff88007ce9e000, task > ffff88007cc49310) > [ 23.080733] Stack: > [ 23.080733] ffff88007cf1d6f8 ffff88007cea6000 ffff88007ce9ff00 ffff88007cc49 > 568 > [ 23.080733] ffff88007ce9fe80 ffffffff803711f5 ffff88007cea6000 ffff88007cc49 > 310 > [ 23.080733] ffff88007ce9fea0 ffffffff8036c985 ffff88007ce9ff00 ffff88007cea6 > 000 > [ 23.080733] Call Trace: > [ 23.080733] [<ffffffff803711f5>] cfq_free_io_context+0x25/0x2f > [ 23.080733] [<ffffffff8036c985>] put_io_context+0x53/0x72 > [ 23.080733] [<ffffffff8036ca61>] exit_io_context+0x8e/0x95 > [ 23.080733] [<ffffffff8023a679>] do_exit+0x858/0x88f > [ 23.080733] [<ffffffff8020c901>] child_rip+0x11/0x20 > [ 23.080733] [<ffffffff8020c2c0>] ? restore_args+0x0/0x30 > [ 23.080733] [<ffffffff80249f30>] ? kthread+0x0/0x76 > [ 23.080733] [<ffffffff8020c8f0>] ? child_rip+0x0/0x20 > [ 23.080733] Code: c6 75 92 60 80 48 89 cf 31 c0 e8 45 b3 00 00 c9 48 98 c3 55 > 48 89 e5 41 56 41 55 41 54 49 89 fc 53 48 89 f3 48 83 7e 08 00 75 04 <0f> 0b eb > fe 4c 8d 6f 08 4c 89 ef e8 77 40 17 00 48 8b 73 08 49 > [ 23.080733] RIP [<ffffffff80371160>] cic_free_func+0x18/0x88 > [ 23.080733] RSP <ffff88007ce9fe40> > [ 25.744530] ---[ end trace 4eaa2a86a8e2da22 ]--- Odd, is it reproducible? What is your .config? -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
