From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Jakobovitsch Subject: Re: BUG at xen4.1/kernel 2.6.32.35 at a CentOS 5.5 when starting a VM Date: Tue, 12 Apr 2011 08:19:36 -0300 Message-ID: <4DA43548.1090104@alog.com.br> References: <4D933ADB.8060106@alog.com.br> <4D9F247C.6030801@alog.com.br> <4D9F805E.2020806@alog.com.br> <20110412105946.GA23127@dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20110412105946.GA23127@dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Konrad Rzeszutek Wilk Cc: xen-devel@lists.xensource.com, Teck Choon Giam List-Id: xen-devel@lists.xenproject.org Yes. It is the same scenario from previous bug. On 04/12/2011 07:59 AM, Konrad Rzeszutek Wilk wrote: > 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: >> [] 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] S= MP >> 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:[] [] >> 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] >> [] ? blktap_ring_ioctl+0x159/0x290 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.769474] >> [] ? error_exit+0x2a/0x60 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.769750] >> [] ? retint_restore_args+0x5/0x6 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.770030] >> [] ? hypercall_page+0x3aa/0x1001 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.770308] >> [] ? hypercall_page+0x3aa/0x1001 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.770592] >> [] ? selinux_file_ioctl+0x0/0x3d >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.770874] >> [] ? xen_force_evtchn_callback+0x9/0xa >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.771157] >> [] ? check_events+0x12/0x20 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.771435] >> [] ? selinux_file_ioctl+0x0/0x3d >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.771715] >> [] ? xen_restore_fl_direct_end+0x0/0x1 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.771993] >> [] ? xen_spin_lock_slow+0xb7/0xf8 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.772275] >> [] ? vfs_ioctl+0x55/0x6b >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.772554] >> [] ? do_vfs_ioctl+0x492/0x4e5 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.772834] >> [] ? xen_restore_fl_direct_end+0x0/0x1 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.773116] >> [] ? sys_ioctl+0x51/0x70 >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.773392] >> [] ? 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 >> [] blktap_device_end_request+0x4e/0x6c >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.777524] RSP >> Apr 8 18:41:58 r2b16ch2x28p2 kernel: [ 3243.777796] CR2: 000000000000= 02f0 >> 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 >>> > wrote: >>> >>> On 03/30/2011 11:44 PM, Teck Choon Giam wrote: >>>> On Wed, Mar 30, 2011 at 10:14 PM, Gerd Jakobovitsch wrote: >>>>> Hello all, >>>>> >>>>> I used to run xen4.0 kernel 2.6.32.24 over CentOS 5.5, with a r= elative 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 PVOP= S 2.6.32.35 over CentOS 5.5. When trying to start a VM, the following bug= s 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_ac= l auth_rpcgss arptable_filter arp_tables xt_esp ipt_ah xt_physdev xt_mult= iport 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:[] [] 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: 000000008005003= b >>>>> [ 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 ffff8800= 64060000, task ffff88007c272d60) >>>>> [ 145.892669] Stack: >>>>> [ 145.892934] ffff88007c272d60 0000000000000000 0000000000000= 000 0000000000000000 >>>>> [ 145.893334]<0> ffff880064061e88 ffffffff812815ae ffff88006= 4061e58 ffffffff811d234f >>>>> [ 145.894035]<0> ffff88007e9bbfc0 ffff88007c75f398 00000001f= fffffff 0000000000000000 >>>>> [ 145.895015] Call Trace: >>>>> [ 145.895286] [] blktap_ring_ioctl+0x183/0x= 2d8 >>>>> [ 145.895566] [] ? inode_has_perm+0x77/0x89 >>>>> [ 145.895844] [] ? inode_has_perm+0x77/0x89 >>>>> [ 145.896124] [] ? _raw_spin_lock+0x77/0x12= f >>>>> [ 145.896403] [] ? _raw_spin_unlock+0xab/0x= b2 >>>>> [ 145.896682] [] ? _spin_unlock+0x9/0xb >>>>> [ 145.896958] [] ? _raw_spin_lock+0x77/0x12= f >>>>> [ 145.897234] [] ? file_has_perm+0xb4/0xc6 >>>>> [ 145.897513] [] vfs_ioctl+0x5e/0x77 >>>>> [ 145.897786] [] do_vfs_ioctl+0x484/0x4d5 >>>>> [ 145.898060] [] sys_ioctl+0x57/0x7a >>>>> [ 145.898338] [] 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 4= 9 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 [] blktap_device_end_requ= est+0x4e/0x63 >>>>> [ 145.902321] RSP >>>>> [ 145.902585] ---[ end trace 2800cfa5aa85ca0a ]--- >>>>> [ 262.100689] BUG: spinlock lockup on CPU#4, vol_id/5181, ffff= 88007c75f520 >>>>> [ 262.100965] Pid: 5181, comm: vol_id Tainted: G D 2.6= .32.35 #1 >>>>> [ 262.101232] Call Trace: >>>>> [ 262.101497] [] _raw_spin_lock+0x101/0x12f >>>>> [ 262.101762] [] _spin_lock_irq+0x1e/0x20 >>>>> [ 262.102028] [] __make_request+0x5e/0x402 >>>>> [ 262.102294] [] ? xen_restore_fl_direct_en= d+0x0/0x1 >>>>> [ 262.102563] [] generic_make_request+0x258= /0x2f4 >>>>> [ 262.102832] [] ? bio_init+0x18/0x32 >>>>> [ 262.103099] [] submit_bio+0xd0/0xd9 >>>>> [ 262.103366] [] submit_bh+0xf7/0x11a >>>>> [ 262.103631] [] block_read_full_page+0x246= /0x264 >>>>> [ 262.103898] [] ? blkdev_get_block+0x0/0x4= d >>>>> [ 262.104165] [] ? _spin_unlock_irq+0x1e/0x= 20 >>>>> [ 262.104433] [] ? add_to_page_cache_locked= +0xa0/0xca >>>>> [ 262.104702] [] blkdev_readpage+0x13/0x15 >>>>> [ 262.104972] [] __do_page_cache_readahead+= 0x144/0x177 >>>>> [ 262.105240] [] ondemand_readahead+0x126/0= x18e >>>>> [ 262.105507] [] page_cache_sync_readahead+= 0x38/0x3a >>>>> [ 262.105778] [] generic_file_aio_read+0x24= c/0x5c1 >>>>> [ 262.106045] [] do_sync_read+0xe2/0x126 >>>>> [ 262.106315] [] ? autoremove_wake_function= +0x0/0x38 >>>>> [ 262.106584] [] ? selinux_file_permission+= 0x5c/0x10e >>>>> [ 262.106854] [] ? security_file_permission= +0x11/0x13 >>>>> [ 262.107120] [] vfs_read+0xab/0x167 >>>>> [ 262.107385] [] sys_read+0x47/0x70 >>>>> [ 262.107652] [] system_call_fastpath+0x16/= 0x1b >>>>> [ 262.107918] sending NMI to all CPUs: >>>>> [ 262.108189] BUG: unable to handle kernel paging request at f= fffffffff5fb310 >>>>> [ 262.108526] IP: [] 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_ac= l auth_rpcgss arptable_filter arp_tables xt_esp ipt_ah xt_physdev xt_mult= iport 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:[] [] 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: 000000008005003= b >>>>> [ 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 ffff880067= 78e000, task ffff88007db86250) >>>>> [ 262.116194] Stack: >>>>> [ 262.116451] 0000000000000000 0000000076e9ecd0 0000000000000= 000 0000000076e9ecd0 >>>>> [ 262.116825]<0> ffff88006778f998 ffffffff8102c841 ffff88006= 778f9b8 ffffffff81029f0d >>>>> [ 262.117485]<0> ffff88007c75f520 ffff88007c75f520 ffff88006= 778f9f8 ffffffff81219eb3 >>>>> [ 262.118396] Call Trace: >>>>> [ 262.118657] [] flat_send_IPI_all+0x1a/0x5= 6 >>>>> [ 262.118925] [] arch_trigger_all_cpu_backt= race+0x45/0x66 >>>>> [ 262.119195] [] _raw_spin_lock+0x106/0x12f >>>>> [ 262.119463] [] _spin_lock_irq+0x1e/0x20 >>>>> [ 262.119730] [] __make_request+0x5e/0x402 >>>>> [ 262.119996] [] ? xen_restore_fl_direct_en= d+0x0/0x1 >>>>> [ 262.120264] [] generic_make_request+0x258= /0x2f4 >>>>> [ 262.120532] [] ? bio_init+0x18/0x32 >>>>> [ 262.120799] [] submit_bio+0xd0/0xd9 >>>>> [ 262.121066] [] submit_bh+0xf7/0x11a >>>>> [ 262.121333] [] block_read_full_page+0x246= /0x264 >>>>> [ 262.121602] [] ? blkdev_get_block+0x0/0x4= d >>>>> [ 262.121870] [] ? _spin_unlock_irq+0x1e/0x= 20 >>>>> [ 262.122137] [] ? add_to_page_cache_locked= +0xa0/0xca >>>>> [ 262.127766] [] blkdev_readpage+0x13/0x15 >>>>> [ 262.128025] [] __do_page_cache_readahead+= 0x144/0x177 >>>>> [ 262.128288] [] ondemand_readahead+0x126/0= x18e >>>>> [ 262.128548] [] page_cache_sync_readahead+= 0x38/0x3a >>>>> [ 262.128810] [] generic_file_aio_read+0x24= c/0x5c1 >>>>> [ 262.129070] [] do_sync_read+0xe2/0x126 >>>>> [ 262.129329] [] ? autoremove_wake_function= +0x0/0x38 >>>>> [ 262.129590] [] ? selinux_file_permission+= 0x5c/0x10e >>>>> [ 262.129851] [] ? security_file_permission= +0x11/0x13 >>>>> [ 262.130110] [] vfs_read+0xab/0x167 >>>>> [ 262.130368] [] sys_read+0x47/0x70 >>>>> [ 262.130624] [] 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 8= 9 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 [] flat_send_IPI_mask+0x6= a/0xc0 >>>>> [ 262.134164] RSP >>>>> [ 262.134419] CR2: ffffffffff5fb310 >>>>> [ 262.134673] ---[ end trace 2800cfa5aa85ca0b ]--- >>>>> >>>> Can you try to recompile your PVOPS kernel with CONFIG_DEBUG_PAG= EALLOC=3Dy? >>>> >>>> You can read more about this BUG at >>>> http://lists.xensource.com/archives/html/xen-devel/2011-03/msg01= 756.html >>>> >>>> I initially hit this BUG sometime Dec 2010... ... >>>> http://lists.xensource.com/archives/html/xen-devel/2010-12/msg01= 501.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 =3D 0) >>> Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: sending 'attach >>> response' message (uuid =3D 0) >>> Apr 8 12:00:43 r2b16ch2x28p2 tapdisk2[15563]: received 'open' >>> message (uuid =3D 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 =3D 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 bondin= g >>> 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:[] [] >>> 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 000000016da5dd= c8 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.661574]<0> >>> 00000000ffffffff ffff88006d8c77e0 00000001816fab27 00000000000000= 00 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.662287] Call Trace: >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.662522] >>> [] blktap_ring_ioctl+0x183/0x2d8 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.662767] >>> [] ? xen_force_evtchn_callback+0xd/0xf >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.663012] >>> [] ? inode_has_perm+0xa1/0xb3 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.663260] >>> [] ? xen_restore_fl_direct_end+0x0/0x1 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.663509] >>> [] ? lock_release+0x1b8/0x1c3 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.663756] >>> [] ? _raw_spin_unlock+0xab/0xb2 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.663999] >>> [] ? _spin_unlock+0x26/0x2a >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.664248] >>> [] ? aio_read_evt+0x87/0x13a >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.664493] >>> [] ? aio_read_evt+0x11c/0x13a >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.664740] >>> [] ? _raw_spin_lock+0x77/0x12f >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.664986] >>> [] ? file_has_perm+0xb4/0xc6 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.665237] >>> [] vfs_ioctl+0x5e/0x77 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.665480] >>> [] do_vfs_ioctl+0x484/0x4d5 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.665726] >>> [] sys_ioctl+0x57/0x7a >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.665970] >>> [] 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 >>> [] blktap_device_end_request+0x4e/0x63 >>> Apr 8 12:00:43 r2b16ch2x28p2 kernel: [ 8879.667577] RSP >>> >>> 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' mes= sage >>> >>> >>> 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 >> --=20 >> >> *Gerd Jakobovitsch >> Engenheiro de Produto ** >> ---------------------------------------------------------* * >> **ALOG Data Centers do Brasil** >> **Excel=EAncia em Projetos de Hosting* >> Rua Dr. Miguel Couto, 58 -- 01008-010 -- S=E3o Paulo - SP >> Telefone: (11) 3524-4970 / (11) 7152-0815 >> *http://www.alog.com.br* >> >> >> *"Como est=E3o nossos servi=E7os? Clique aqui >> e nos conte. Queremos >> escutar a sua opini=E3o!"* >> >> >> >> >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@lists.xensource.com >> http://lists.xensource.com/xen-devel