(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). The ata driver detected an error and the kernel immediately oopsed somewhere in the CPU scheduler. I'd be suspecting a bug somewhere in a rarely-used ata/block codepath. On Sun, 13 Mar 2011 00:31:38 GMT bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=31022 > > Summary: Kernel oops under dequeue_task_fair > Product: Process Management > Version: 2.5 > Kernel Version: 2.6.38-rc3 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Other > AssignedTo: process_other@xxxxxxxxxxxxxxxxxxxx > ReportedBy: sgunderson@xxxxxxxxxxx > Regression: No > > > Hi, > > Under somewhat heavy load, I first had problems with eth0 going haywire: > > [1041371.708420] e1000e 0000:04:00.0: eth0: Detected Hardware Unit Hang: > [1041371.708423] TDH <0> > [1041371.708424] TDT <2> > [1041371.708426] next_to_use <2> > [1041371.708427] next_to_clean <0> > [1041371.708428] buffer_info[next_to_clean]: > [1041371.708429] time_stamp <13e0d57d6> > [1041371.708431] next_to_watch <0> > [1041371.708432] jiffies <13e0d7e5c> > [1041371.708433] next_to_watch.status <0> > [1041371.708434] MAC Status <2080783> > [1041371.708436] PHY Status <792d> > [1041371.708437] PHY 1000BASE-T Status <7800> > [1041371.708438] PHY Extended Status <3000> > [1041371.708439] PCI Status <c110> > <repeat the above ten times or so> > [1041371.782410] e1000e 0000:04:00.0: eth0: Reset adapter > [1041415.765409] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow > Control: None > > I switched the cables, took out the module, renamed eth1 to eth0 and added > things back. But 15 minutes later or so, I got the following oops: > > [1041979.906665] ata9.00: exception Emask 0x32 SAct 0x0 SErr 0x1000400 action > 0x6 frozen > [1041979.915101] ata9.00: irq_stat 0x18000000, host bus error, interface fatal > error > [1041979.923457] ata9: SError: { Proto TrStaTrns } > [1041979.929119] ata9.00: failed command: READ DMA > [1041979.934597] ata9.00: cmd c8/00:38:18:a2:7b/00:00:00:00:00/e0 tag 0 dma > 28672 in > [1041979.934608] res 50/00:00:00:00:00/00:00:00:00:00/a0 Emask 0x32 > (host bus error) > [1041979.951381] ata9.00: status: { DRDY } > [1041979.955938] ata9: hard resetting link > [1041980.002432] BUG: unable to handle kernel NULL pointer dereference at > 0000000000000181 > [1041980.003006] IP: [<ffffffff8102dd5c>] dequeue_task_fair+0x20/0x227 > [1041980.003006] PGD 1310b4067 PUD 11d62d067 PMD 0 > [1041980.003006] Oops: 0000 [#1] SMP > [1041980.003006] last sysfs file: > /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map > [1041980.003006] CPU 5 > [1041980.003006] Modules linked in: e1000e ip_gre gre ipt_REJECT iptable_filter > ip_tables af_packet microcode nfsd exportfs nfs lockd auth_rpcgss sunrpc ext2 > ext4 jbd2 crc16 fuse coretemp hwmon_vid ide_generic ide_gd_mod ide_cd_mod > ide_core cdrom forcedeth i2c_i801 psmouse rtc_cmos i2c_core ghes pcspkr shpchp > hed rtc_core serio_raw rtc_lib evdev pci_hotplug ext3 jbd mbcache dm_mod > raid456 async_pq async_xor xor async_memcpy async_raid6_recov raid6_pq async_tx > raid1 md_mod usbhid sd_mod uhci_hcd ahci libahci ehci_hcd sata_mv unix [last > unloaded: e1000e] > [1041980.003006] > [1041980.003006] Pid: 31125, comm: exifautotran Tainted: G W > 2.6.38-rc6 #1 Supermicro X7DBN/X7DBN > [1041980.003006] RIP: 0010:[<ffffffff8102dd5c>] [<ffffffff8102dd5c>] > dequeue_task_fair+0x20/0x227 > [1041980.003006] RSP: 0018:ffff88021ac6db00 EFLAGS: 00010006 > [1041980.003006] RAX: ffffffff8133ec20 RBX: ffff8800cfd51800 RCX: > 0000000000000000 > [1041980.003006] RDX: 0000000000000001 RSI: 0000000000000001 RDI: > ffff8800cfd51800 > [1041980.003006] RBP: ffff88021ac6db28 R08: 0000000000000000 R09: > ffff8800cfccd8e0 > [1041980.003006] R10: 0000000000000052 R11: 0000000000000054 R12: > 0000000000000039 > [1041980.003006] R13: ffff88021ac6de10 R14: ffff880129179660 R15: > ffff880129179660 > [1041980.003006] FS: 00007f1441b39700(0000) GS:ffff8800cfd40000(0000) > knlGS:0000000000000000 > [1041980.003006] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [1041980.003006] CR2: 0000000000000181 CR3: 00000001444f1000 CR4: > 00000000000006e0 > [1041980.003006] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [1041980.003006] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > 0000000000000400 > [1041980.003006] Process exifautotran (pid: 31125, threadinfo ffff88021ac6c000, > task ffff880129179660) > [1041980.003006] Stack: > [1041980.003006] 0000ffff8102df56 ffff880129179660 ffff8800cfd51800 > ffff88021ac6de10 > [1041980.003006] 0000000000000000 ffff88021ac6db58 ffffffff8102adea > 0000000300000041 > [1041980.003006] 0000000000000001 ffff8800cfd51800 7fffffffffffffff > ffff88021ac6db78 > [1041980.003006] Call Trace: > [1041980.003006] [<ffffffff8102adea>] dequeue_task+0x80/0x8e > [1041980.003006] [<ffffffff8102ae20>] deactivate_task+0x28/0x30 > [1041980.003006] [<ffffffff8132613c>] schedule+0x383/0xaac > [1041980.003006] [<ffffffff810a0a29>] ? get_page_from_freelist+0x39d/0x45b > [1041980.003006] [<ffffffff8111614a>] ? dquot_file_open+0x16/0x37 > [1041980.003006] [<ffffffff8113d1b8>] ? security_dentry_open+0x59/0x5e > [1041980.003006] [<ffffffff810d2f1e>] ? __dentry_open+0x182/0x274 > [1041980.003006] [<ffffffff810dca75>] ? generic_permission+0x17/0x93 > [1041980.003006] [<ffffffff81058579>] ? sched_clock_local+0x1c/0x82 > [1041980.003006] [<ffffffff81326996>] schedule_timeout+0x28/0x208 > [1041980.003006] [<ffffffff8102ae80>] ? enqueue_task+0x58/0x66 > [1041980.003006] [<ffffffff81325ca7>] wait_for_common+0xbf/0x135 > [1041980.003006] [<ffffffff81033f0c>] ? default_wake_function+0x0/0xf > [1041980.003006] [<ffffffff81325db7>] wait_for_completion+0x18/0x1a > [1041980.003006] [<ffffffff8107247a>] stop_one_cpu+0x5b/0x75 > [1041980.003006] [<ffffffff810339d6>] ? migration_cpu_stop+0x0/0x1d > [1041980.003006] [<ffffffff810325e9>] sched_exec+0xa7/0xbe > [1041980.003006] [<ffffffff810dac13>] do_execve+0xb8/0x2a9 > [1041980.003006] [<ffffffff81008d2b>] sys_execve+0x3e/0x5c > [1041980.003006] [<ffffffff810022dc>] stub_execve+0x6c/0xc0 > [1041980.003006] Code: 89 e0 5b 41 5c 41 5d 41 5e c9 c3 55 48 89 e5 41 57 41 5e > 51 89 d6 41 55 41 54 4c 8d 66 38 53 48 89 fb 48 83 ec 08 e9 9a 01 00 00 <4d> 8b > ac 24 48 01 00 00 4c 89 ef e8 d6 c5 ff ff 4d 3b 65 50 74 > [1041980.003006] RIP [<ffffffff8102dd5c>] dequeue_task_fair+0x20/0x227 > [1041980.003006] RSP <ffff88021ac6db00> > [1041980.003006] CR2: 0000000000000181 > [1041980.003006] ---[ end trace 342ac00b53041caa ]--- > > ... > -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
