On Fri, Apr 08, 2011 at 06:38:38PM -0300, Gerd Jakobovitsch wrote:
> One more follow-up:
>
> Another kernel bug report, with no kernel debug activated:
This is just with the guest starting right? Not running for a long time?
>
> r2b16ch2x28p2 kernel: [ 3243.777796] CR2: 00000000000002f0
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.761622] BUG: unable to
> handle kernel NULL pointer dereference at 00000000000002f0
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.761781] IP:
> [<ffffffff8121e7f9>] blktap_device_end_request+0x4e/0x6c
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.761892] PGD 710a3067
> PUD 724c6067 PMD 0
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.762076] Oops: 0000 [#1] SMP
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.762212] last sysfs
> file: /sys/devices/vbd-6-51712/statistics/wr_sect
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.762271] CPU 5
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.762363] Modules linked
> in: bnx2 xt_mac bridge stp nfs fscache nfs_acl auth_rpcgss
> arptable_filter arp_tables xt_esp ipt_ah xt_physdev xt_multiport
> lockd sunrpc bonding dm_multipath megaraid_sas [last unloaded: bnx2]
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.763350] Pid: 7781,
> comm: tapdisk2 Not tainted 2.6.32.36 #5 PowerEdge M610
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.763410] RIP:
> e030:[<ffffffff8121e7f9>] [<ffffffff8121e7f9>]
> blktap_device_end_request+0x4e/0x6c
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.763519] RSP:
> e02b:ffff88006ed49cf8 EFLAGS: 00010046
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.763574] RAX:
> 0000000000000000 RBX: ffff88005e6fc3e0 RCX: ffffffff811a3de6
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.763635] RDX:
> ffff88005e6fc3e0 RSI: ffffffff8149bed6 RDI: ffff880070f42178
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.763694] RBP:
> ffff880070f42010 R08: ffffffff81661840 R09: 00000001002c9435
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.763971] R10:
> 0000000000000000 R11: ffff88005e6378f0 R12: ffff88005e6378f0
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.764244] R13:
> ffff880070f42000 R14: 0000000000000000 R15: 0000000000000001
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.764522] FS:
> 00007fcfd34b0730(0000) GS:ffff880015fe7000(0000)
> knlGS:0000000000000000
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.765011] CS: e033 DS:
> 0000 ES: 0000 CR0: 000000008005003b
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.765280] CR2:
> 00000000000002f0 CR3: 000000006ed46000 CR4: 0000000000002660
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.765554] DR0:
> 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.765829] DR3:
> 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.766105] Process
> tapdisk2 (pid: 7781, threadinfo ffff88006ed48000, task
> ffff880079486270)
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.766602] Stack:
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.766868]
> ffff88007a81dee0 ffff880079486270 0000000000000000 0000000000000001
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.767266] <0>
> 0000000000000001 ffffffff8121e0b9 0000000000000003 0000000000000000
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.767967] <0>
> ffff880070f42000 0000bda50000bda7 ffff88005e6fc3e0 fffffffd00000000
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.768921] Call Trace:
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.769193]
> [<ffffffff8121e0b9>] ? blktap_ring_ioctl+0x159/0x290
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.769474]
> [<ffffffff8149c50a>] ? error_exit+0x2a/0x60
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.769750]
> [<ffffffff810133dd>] ? retint_restore_args+0x5/0x6
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.770030]
> [<ffffffff810093aa>] ? hypercall_page+0x3aa/0x1001
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.770308]
> [<ffffffff810093aa>] ? hypercall_page+0x3aa/0x1001
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.770592]
> [<ffffffff811846b6>] ? selinux_file_ioctl+0x0/0x3d
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.770874]
> [<ffffffff8100eca5>] ? xen_force_evtchn_callback+0x9/0xa
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.771157]
> [<ffffffff8100f342>] ? check_events+0x12/0x20
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.771435]
> [<ffffffff811846b6>] ? selinux_file_ioctl+0x0/0x3d
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.771715]
> [<ffffffff8100f32f>] ? xen_restore_fl_direct_end+0x0/0x1
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.771993]
> [<ffffffff8100fcea>] ? xen_spin_lock_slow+0xb7/0xf8
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.772275]
> [<ffffffff810c825a>] ? vfs_ioctl+0x55/0x6b
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.772554]
> [<ffffffff810c8775>] ? do_vfs_ioctl+0x492/0x4e5
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.772834]
> [<ffffffff8100f32f>] ? xen_restore_fl_direct_end+0x0/0x1
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.773116]
> [<ffffffff810c8819>] ? sys_ioctl+0x51/0x70
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.773392]
> [<ffffffff81012a02>] ? system_call_fastpath+0x16/0x1b
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.773671] Code: e8 39 f6
> ff ff 49 8b 44 24 40 48 8b b8 f0 02 00 00 e8 e6 d6 27 00 4c 89 e7 41
> 8b 54 24 60 44 89 f6 e8 b9 59 f8 ff 49 8b 44 24 40 <48> 8b b8 f0 02
> 00 00 e8 02 14 df ff 66 90 ff 14 25 78 8d 65 81
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.777198] RIP
> [<ffffffff8121e7f9>] blktap_device_end_request+0x4e/0x6c
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.777524] RSP <ffff88006ed49cf8>
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.777796] CR2: 00000000000002f0
> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.778067] ---[ end trace
> a71b80c14de09da1 ]---
>
> On 04/08/2011 12:44 PM, Teck Choon Giam wrote:
> >
> >
> >On Fri, Apr 8, 2011 at 11:06 PM, Gerd Jakobovitsch
> ><gerd@xxxxxxxxxxx <mailto:gerd@xxxxxxxxxxx>> wrote:
> >
> > On 03/30/2011 11:44 PM, Teck Choon Giam wrote:
> >> On Wed, Mar 30, 2011 at 10:14 PM, Gerd Jakobovitsch<gerd@xxxxxxxxxxx>
> >> <mailto:gerd@xxxxxxxxxxx> wrote:
> >>> Hello all,
> >>>
> >>> I used to run xen4.0 kernel 2.6.32.24 over CentOS 5.5, with a relative
> >>> success, but the bug at mmu.c appeared once at a while. Therefore, I'm
> >>> looking for a more stable option.
> >>> I compiled and ran the newly released xen 4.1, with kernel PVOPS
> >>> 2.6.32.35 over CentOS 5.5. When trying to start a VM, the following bugs
> >>> appeared at dmesg. After that, xl and xm commands do not longer respond:
> >>>
> >>> [ 145.749573] alloc irq_desc for 2209 on node -1
> >>> [ 145.749581] alloc kstat_irqs on node -1
> >>> [ 145.883515] block tda: sector-size: 512 capacity: 262144
> >>> [ 145.889952] general protection fault: 0000 [#1] SMP
> >>> [ 145.890109] last sysfs file: /sys/block/tda/removable
> >>> [ 145.890164] CPU 7
> >>> [ 145.890252] Modules linked in: bridge stp nfs fscache nfs_acl
> >>> auth_rpcgss arptable_filter arp_tables xt_esp ipt_ah xt_physdev
> >>> xt_multiport lockd sunrpc bonding dm_multipath bnx2 megaraid_sas
> >>> [ 145.891125] Pid: 5179, comm: tapdisk2 Not tainted 2.6.32.35 #1
> >>> PowerEdge M610
> >>> [ 145.891184] RIP: e030:[<ffffffff81281e79>] [<ffffffff81281e79>]
> >>> blktap_device_end_request+0x4e/0x63
> >>> [ 145.891296] RSP: e02b:ffff880064061cd8 EFLAGS: 00010046
> >>> [ 145.891351] RAX: 6b6b6b6b6b6b6b6b RBX: ffff88007d264690 RCX:
> >>> 0000000000000028
> >>> [ 145.891410] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
> >>> 0000000000000000
> >>> [ 145.891469] RBP: ffff880064061cf8 R08: 0000000064061c98 R09:
> >>> ffff88007da42948
> >>> [ 145.891528] R10: ffffea0000000008 R11: 0000000001f60080 R12:
> >>> ffff88007da427f8
> >>> [ 145.891587] R13: ffff88007c75f398 R14: 0000000000000000 R15:
> >>> ffff88007c75f3a8
> >>> [ 145.891651] FS: 00007ff33d9a4730(0000) GS:ffff8800189e5000(0000)
> >>> knlGS:0000000000000000
> >>> [ 145.891714] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
> >>> [ 145.891771] CR2: 0000000002594cc8 CR3: 000000007be61000 CR4:
> >>> 0000000000002660
> >>> [ 145.891830] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> >>> 0000000000000000
> >>> [ 145.891890] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> >>> 0000000000000400
> >>> [ 145.892171] Process tapdisk2 (pid: 5179, threadinfo
> >>> ffff880064060000, task ffff88007c272d60)
> >>> [ 145.892669] Stack:
> >>> [ 145.892934] ffff88007c272d60 0000000000000000 0000000000000000
> >>> 0000000000000000
> >>> [ 145.893334]<0> ffff880064061e88 ffffffff812815ae ffff880064061e58
> >>> ffffffff811d234f
> >>> [ 145.894035]<0> ffff88007e9bbfc0 ffff88007c75f398 00000001ffffffff
> >>> 0000000000000000
> >>> [ 145.895015] Call Trace:
> >>> [ 145.895286] [<ffffffff812815ae>] blktap_ring_ioctl+0x183/0x2d8
> >>> [ 145.895566] [<ffffffff811d234f>] ? inode_has_perm+0x77/0x89
> >>> [ 145.895844] [<ffffffff811d234f>] ? inode_has_perm+0x77/0x89
> >>> [ 145.896124] [<ffffffff81219e24>] ? _raw_spin_lock+0x77/0x12f
> >>> [ 145.896403] [<ffffffff81219d28>] ? _raw_spin_unlock+0xab/0xb2
> >>> [ 145.896682] [<ffffffff81529311>] ? _spin_unlock+0x9/0xb
> >>> [ 145.896958] [<ffffffff81219e24>] ? _raw_spin_lock+0x77/0x12f
> >>> [ 145.897234] [<ffffffff811d2415>] ? file_has_perm+0xb4/0xc6
> >>> [ 145.897513] [<ffffffff810fe868>] vfs_ioctl+0x5e/0x77
> >>> [ 145.897786] [<ffffffff810fed7d>] do_vfs_ioctl+0x484/0x4d5
> >>> [ 145.898060] [<ffffffff810fee25>] sys_ioctl+0x57/0x7a
> >>> [ 145.898338] [<ffffffff81013d02>] system_call_fastpath+0x16/0x1b
> >>> [ 145.898614] Code: e8 5f f4 ff ff 49 8b 44 24 40 48 8b b8 80 03 00
> >>> 00 e8 64 75 2a 00 41 8b 54 24 60 44 89 f6 4c 89 e7 e8 b5 89 f7 ff 49 8b
> >>> 44 24 40<48> 8b b8 80 03 00 00 e8 23 74 2a 00 5b 41 5c 41 5d 41 5e c9 c3
> >>> [ 145.902008] RIP [<ffffffff81281e79>]
> >>> blktap_device_end_request+0x4e/0x63
> >>> [ 145.902321] RSP<ffff880064061cd8>
> >>> [ 145.902585] ---[ end trace 2800cfa5aa85ca0a ]---
> >>> [ 262.100689] BUG: spinlock lockup on CPU#4, vol_id/5181,
> >>> ffff88007c75f520
> >>> [ 262.100965] Pid: 5181, comm: vol_id Tainted: G D 2.6.32.35
> >>> #1
> >>> [ 262.101232] Call Trace:
> >>> [ 262.101497] [<ffffffff81219eae>] _raw_spin_lock+0x101/0x12f
> >>> [ 262.101762] [<ffffffff815293e6>] _spin_lock_irq+0x1e/0x20
> >>> [ 262.102028] [<ffffffff811fcc14>] __make_request+0x5e/0x402
> >>> [ 262.102294] [<ffffffff8101019f>] ?
> >>> xen_restore_fl_direct_end+0x0/0x1
> >>> [ 262.102563] [<ffffffff811fa171>] generic_make_request+0x258/0x2f4
> >>> [ 262.102832] [<ffffffff811156d8>] ? bio_init+0x18/0x32
> >>> [ 262.103099] [<ffffffff811fbec8>] submit_bio+0xd0/0xd9
> >>> [ 262.103366] [<ffffffff81111574>] submit_bh+0xf7/0x11a
> >>> [ 262.103631] [<ffffffff8111448f>] block_read_full_page+0x246/0x264
> >>> [ 262.103898] [<ffffffff81117c13>] ? blkdev_get_block+0x0/0x4d
> >>> [ 262.104165] [<ffffffff815292c6>] ? _spin_unlock_irq+0x1e/0x20
> >>> [ 262.104433] [<ffffffff810ba73d>] ?
> >>> add_to_page_cache_locked+0xa0/0xca
> >>> [ 262.104702] [<ffffffff81116ef9>] blkdev_readpage+0x13/0x15
> >>> [ 262.104972] [<ffffffff810c1d36>]
> >>> __do_page_cache_readahead+0x144/0x177
> >>> [ 262.105240] [<ffffffff810c1f8f>] ondemand_readahead+0x126/0x18e
> >>> [ 262.105507] [<ffffffff810c20d7>]
> >>> page_cache_sync_readahead+0x38/0x3a
> >>> [ 262.105778] [<ffffffff810bb833>] generic_file_aio_read+0x24c/0x5c1
> >>> [ 262.106045] [<ffffffff810f1808>] do_sync_read+0xe2/0x126
> >>> [ 262.106315] [<ffffffff81068a02>] ?
> >>> autoremove_wake_function+0x0/0x38
> >>> [ 262.106584] [<ffffffff811d701c>] ?
> >>> selinux_file_permission+0x5c/0x10e
> >>> [ 262.106854] [<ffffffff811ce9c4>] ?
> >>> security_file_permission+0x11/0x13
> >>> [ 262.107120] [<ffffffff810f1f7b>] vfs_read+0xab/0x167
> >>> [ 262.107385] [<ffffffff810f2374>] sys_read+0x47/0x70
> >>> [ 262.107652] [<ffffffff81013d02>] system_call_fastpath+0x16/0x1b
> >>> [ 262.107918] sending NMI to all CPUs:
> >>> [ 262.108189] BUG: unable to handle kernel paging request at
> >>> ffffffffff5fb310
> >>> [ 262.108526] IP: [<ffffffff8102c7d1>] flat_send_IPI_mask+0x6a/0xc0
> >>> [ 262.108832] PGD 1003067 PUD 1004067 PMD 18b7067 PTE 0
> >>> [ 262.109235] Oops: 0002 [#2] SMP
> >>> [ 262.109565] last sysfs file: /sys/class/blktap2/blktap1/dev
> >>> [ 262.109830] CPU 4
> >>> [ 262.110121] Modules linked in: bridge stp nfs fscache nfs_acl
> >>> auth_rpcgss arptable_filter arp_tables xt_esp ipt_ah xt_physdev
> >>> xt_multiport lockd sunrpc bonding dm_multipath bnx2 megaraid_sas
> >>> [ 262.111520] Pid: 5181, comm: vol_id Tainted: G D 2.6.32.35
> >>> #1 PowerEdge M610
> >>> [ 262.112008] RIP: e030:[<ffffffff8102c7d1>] [<ffffffff8102c7d1>]
> >>> flat_send_IPI_mask+0x6a/0xc0
> >>> [ 262.112535] RSP: e02b:ffff88006778f968 EFLAGS: 00010086
> >>> [ 262.112800] RAX: 00000000ff000000 RBX: ffffffff81790060 RCX:
> >>> 00000000000160a0
> >>> [ 262.113068] RDX: ffff88001898e000 RSI: 0000000000000002 RDI:
> >>> ffffffff81816020
> >>> [ 262.113337] RBP: ffff88006778f988 R08: 0000000000000000 R09:
> >>> 0000000000000004
> >>> [ 262.113605] R10: 0000000000000002 R11: 0000000000000004 R12:
> >>> 0000000000000002
> >>> [ 262.113877] R13: 0000000000000800 R14: 00000000000000ff R15:
> >>> 0000000000000000
> >>> [ 262.114149] FS: 00007fa78bcc5710(0063) GS:ffff88001898e000(0000)
> >>> knlGS:0000000000000000
> >>> [ 262.114636] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
> >>> [ 262.114902] CR2: ffffffffff5fb310 CR3: 00000000641b4000 CR4:
> >>> 0000000000002660
> >>> [ 262.115171] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> >>> 0000000000000000
> >>> [ 262.115438] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> >>> 0000000000000400
> >>> [ 262.115707] Process vol_id (pid: 5181, threadinfo ffff88006778e000,
> >>> task ffff88007db86250)
> >>> [ 262.116194] Stack:
> >>> [ 262.116451] 0000000000000000 0000000076e9ecd0 0000000000000000
> >>> 0000000076e9ecd0
> >>> [ 262.116825]<0> ffff88006778f998 ffffffff8102c841 ffff88006778f9b8
> >>> ffffffff81029f0d
> >>> [ 262.117485]<0> ffff88007c75f520 ffff88007c75f520 ffff88006778f9f8
> >>> ffffffff81219eb3
> >>> [ 262.118396] Call Trace:
> >>> [ 262.118657] [<ffffffff8102c841>] flat_send_IPI_all+0x1a/0x56
> >>> [ 262.118925] [<ffffffff81029f0d>]
> >>> arch_trigger_all_cpu_backtrace+0x45/0x66
> >>> [ 262.119195] [<ffffffff81219eb3>] _raw_spin_lock+0x106/0x12f
> >>> [ 262.119463] [<ffffffff815293e6>] _spin_lock_irq+0x1e/0x20
> >>> [ 262.119730] [<ffffffff811fcc14>] __make_request+0x5e/0x402
> >>> [ 262.119996] [<ffffffff8101019f>] ?
> >>> xen_restore_fl_direct_end+0x0/0x1
> >>> [ 262.120264] [<ffffffff811fa171>] generic_make_request+0x258/0x2f4
> >>> [ 262.120532] [<ffffffff811156d8>] ? bio_init+0x18/0x32
> >>> [ 262.120799] [<ffffffff811fbec8>] submit_bio+0xd0/0xd9
> >>> [ 262.121066] [<ffffffff81111574>] submit_bh+0xf7/0x11a
> >>> [ 262.121333] [<ffffffff8111448f>] block_read_full_page+0x246/0x264
> >>> [ 262.121602] [<ffffffff81117c13>] ? blkdev_get_block+0x0/0x4d
> >>> [ 262.121870] [<ffffffff815292c6>] ? _spin_unlock_irq+0x1e/0x20
> >>> [ 262.122137] [<ffffffff810ba73d>] ?
> >>> add_to_page_cache_locked+0xa0/0xca
> >>> [ 262.127766] [<ffffffff81116ef9>] blkdev_readpage+0x13/0x15
> >>> [ 262.128025] [<ffffffff810c1d36>]
> >>> __do_page_cache_readahead+0x144/0x177
> >>> [ 262.128288] [<ffffffff810c1f8f>] ondemand_readahead+0x126/0x18e
> >>> [ 262.128548] [<ffffffff810c20d7>]
> >>> page_cache_sync_readahead+0x38/0x3a
> >>> [ 262.128810] [<ffffffff810bb833>] generic_file_aio_read+0x24c/0x5c1
> >>> [ 262.129070] [<ffffffff810f1808>] do_sync_read+0xe2/0x126
> >>> [ 262.129329] [<ffffffff81068a02>] ?
> >>> autoremove_wake_function+0x0/0x38
> >>> [ 262.129590] [<ffffffff811d701c>] ?
> >>> selinux_file_permission+0x5c/0x10e
> >>> [ 262.129851] [<ffffffff811ce9c4>] ?
> >>> security_file_permission+0x11/0x13
> >>> [ 262.130110] [<ffffffff810f1f7b>] vfs_read+0xab/0x167
> >>> [ 262.130368] [<ffffffff810f2374>] sys_read+0x47/0x70
> >>> [ 262.130624] [<ffffffff81013d02>] system_call_fastpath+0x16/0x1b
> >>> [ 262.130883] Code: 8b 05 b4 95 7e 00 83 fe 02 44 8b 68 34 75 0a ff
> >>> 90 58 01 00 00 eb 0e f3 90 8b 04 25 00 b3 5f ff f6 c4 10 75 f2 44 89 f0
> >>> c1 e0 18<89> 04 25 10 b3 5f ff 41 83 fc 02 74 08 44 89 e0 44 09 e8 eb 06
> >>> [ 262.133866] RIP [<ffffffff8102c7d1>] flat_send_IPI_mask+0x6a/0xc0
> >>> [ 262.134164] RSP<ffff88006778f968>
> >>> [ 262.134419] CR2: ffffffffff5fb310
> >>> [ 262.134673] ---[ end trace 2800cfa5aa85ca0b ]---
> >>>
> >> Can you try to recompile your PVOPS kernel with
> >> CONFIG_DEBUG_PAGEALLOC=y?
> >>
> >> You can read more about this BUG at
> >> http://lists.xensource.com/archives/html/xen-devel/2011-03/msg01756.html
> >>
> >> I initially hit this BUG sometime Dec 2010... ...
> >> http://lists.xensource.com/archives/html/xen-devel/2010-12/msg01501.html
> >>
> >> Thanks.
> >>
> >> Kindest regards,
> >> Giam Teck Choon
> > Sorry for the delayed answer. The problem I'm facing now is not
> > related to the mmu bug - that one I still am seeing at systems
> > with xen 4.0.2 / kernel 2.6.32.24. Newer kernels have new bugs,
> > much more troublesome, since I can not run a single VM instance.
> >
> > Adding DEBUG_PAGEALLOC, the main difference is that the system is
> > rebooting shortly after trying to start up a VM:
> >
> >
> >Ok. Sorry, didn't see your log message carefully previously.
> >
> >
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: I/O queue driver: lio
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: received 'attach'
> > message (uuid = 0)
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: sending 'attach
> > response' message (uuid = 0)
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: received 'open'
> > message (uuid = 0)
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: block-aio
> > open('/storage5/linux-centos-5-64b-base-7253/hda')
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]:
> > open(/storage5/linux-centos-5-64b-base-7253/hda) with O_DIRECT
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: Image size:
> >pre sector_shift [134217728] post sector_shift [262144]
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: opened image
> > /storage5/linux-centos-5-64b-base-rip/hda (1 users, state:
> > 0x00000001, type: 0)
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: VBD CHAIN:
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]:
> > /storage5/linux-centos-5-64b-base/hda: 0
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: sending 'open
> > response' message (uuid = 0)
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.644887] block tda:
> > sector-size: 512 capacity: 262144
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.657328] general
> > protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.657379] last sysfs
> > file: /sys/block/tda/removable
> >
> >
> >Just curious... ... what type of storage you are using for your VMs?
> >
> >
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.657400] CPU 0
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.657421] Modules
> > linked in: nfs fscache nfs_acl auth_rpcgss bridge stp ocfs2
> > ocfs2_dlmfs ocfs2_stack_o2cb ocfs2_dlm ocfs2_nodemanager
> > ocfs2_stackglue configfs arptable_filter arp_tables xt_esp ipt_ah
> > xt_physdev xt_multiport dm_round_robin lockd sunrpc crc32c bonding
> > iscsi_tcp libiscsi_tcp bnx2i libiscsi scsi_transport_iscsi cnic
> > uio dm_multipath bnx2 megaraid_sas
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.657736] Pid: 15566,
> > comm: tapdisk2 Not tainted 2.6.32.36 #4 PowerEdge M610
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.657763] RIP:
> > e030:[<ffffffff8129fb89>] [<ffffffff8129fb89>]
> > blktap_device_end_request+0x4e/0x63
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.657808] RSP:
> > e02b:ffff88006da5dcd8 EFLAGS: 00010046
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.657833] RAX:
> > 6b6b6b6b6b6b6b6b RBX: ffff88006566c000 RCX: 0000000000000000
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.657860] RDX:
> > 0000000000000000 RSI: 0000000000000000 RDI: ffff88006d8c7980
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.657887] RBP:
> > ffff88006da5dcf8 R08: ffffffff817e66a0 R09: ffff88007d775790
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.658136] R10:
> > ffffffff810ccfe4 R11: ffff8800280d8f60 R12: ffff88006720e7f8
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.658384] R13:
> > ffff88006d8c77e0 R14: 0000000000000000 R15: ffff88006d8c77f0
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.658635] FS:
> >00007f86d75a3730(0000) GS:ffff8800280c7000(0000)
> > knlGS:0000000000000000
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.659107] CS: e033 DS:
> > 0000 ES: 0000 CR0: 000000008005003b
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.659351] CR2:
> > 0000000045614ed8 CR3: 000000006d911000 CR4: 0000000000002660
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.659600] DR0:
> > 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.659847] DR3:
> > 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.660100] Process
> > tapdisk2 (pid: 15566, threadinfo ffff88006da5c000, task
> > ffff88007d7750f0)
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.660574] Stack:
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.660807]
> >ffff88007d7750f0 0000000000000000 0000000000000000
> >0000000000000000
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.661074] <0>
> > ffff88006da5de88 ffffffff8129f2c0 ffffffff8100fedd 000000016da5ddc8
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.661574] <0>
> > 00000000ffffffff ffff88006d8c77e0 00000001816fab27 0000000000000000
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.662287] Call Trace:
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.662522]
> >[<ffffffff8129f2c0>] blktap_ring_ioctl+0x183/0x2d8
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.662767]
> >[<ffffffff8100fedd>] ? xen_force_evtchn_callback+0xd/0xf
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.663012]
> >[<ffffffff811ebe9b>] ? inode_has_perm+0xa1/0xb3
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.663260]
> >[<ffffffff8101064f>] ? xen_restore_fl_direct_end+0x0/0x1
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.663509]
> >[<ffffffff81081d84>] ? lock_release+0x1b8/0x1c3
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.663756]
> >[<ffffffff81233d2c>] ? _raw_spin_unlock+0xab/0xb2
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.663999]
> >[<ffffffff8155618d>] ? _spin_unlock+0x26/0x2a
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.664248]
> >[<ffffffff81134aa1>] ? aio_read_evt+0x87/0x13a
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.664493]
> >[<ffffffff81134b36>] ? aio_read_evt+0x11c/0x13a
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.664740]
> >[<ffffffff81233ecc>] ? _raw_spin_lock+0x77/0x12f
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.664986]
> >[<ffffffff811ec054>] ? file_has_perm+0xb4/0xc6
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.665237]
> >[<ffffffff81112444>] vfs_ioctl+0x5e/0x77
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.665480]
> >[<ffffffff81112959>] do_vfs_ioctl+0x484/0x4d5
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.665726]
> >[<ffffffff81112a01>] sys_ioctl+0x57/0x7a
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.665970]
> >[<ffffffff81013d42>] system_call_fastpath+0x16/0x1b
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.666214] Code: e8 61
> > f4 ff ff 49 8b 44 24 40 48 8b b8 70 04 00 00 e8 79 67 2b 00 41 8b
> > 54 24 60 44 89 f6 4c 89 e7 e8 76 3b f7 ff 49 8b 44 24 40 <48> 8b
> > b8 70 04 00 00 e8 1d 65 2b 00 5b 41 5c 41 5d 41 5e c9 c3
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.667320] RIP
> >[<ffffffff8129fb89>] blktap_device_end_request+0x4e/0x63
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.667577] RSP
> > <ffff88006da5dcd8>
> > Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.668069] ---[ end
> > trace da218b929afc63f7 ]---
> > Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15584]: I/O queue driver: lio
> > Apr 8 12:00:48 r2b16ch2x28p2 tap-ctl:
> > tap-err:tap_ctl_read_message: failure reading message
> > Apr 8 12:00:48 r2b16ch2x28p2 tap-ctl:
> > tap-err:tap_ctl_send_and_receive: failed to receive 'unknown' message
> >
> >
> >Looks like it is related to blktap/blktap2 drivers related issue
> >to me... so you are right... ... this is different BUG from what I
> >encountered as the logs are different. Sorry, didn't read your
> >log carefully before replying previously. Have you try to use
> >normal LVM for your VM to reproduce the BUG as I guess you are
> >using different storage?
> >
> >Thanks.
> >
> >Kindest regards,
> >Giam Teck Choon
>
> --
>
> *Gerd Jakobovitsch
> Engenheiro de Produto **
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