Hi all, this is a second trace from the same machine. The process blocked isn't the DNS server anymore, so the problem seems not related to any process. I collected three traces with three different processes. Please note the problem is not XEN specific, since I may reproduce the problem with non XEN kernel (same kernel version).
Thank you very much for working on this subject. Dec 21 08:34:10 atf-124 kernel: [ 64.093097] ------------[ cut here ]------------ Dec 21 08:34:10 atf-124 kernel: [ 64.093209] kernel BUG at /build/buildd-linux-2.6_2.6.32-27-i386-c5N4Hf/linux-2.6-2.6 .32/debian/build/source_i386_xen/arch/x86/xen/enlighten.c:309! Dec 21 08:34:10 atf-124 kernel: [ 64.093456] invalid opcode: 0000 [#1] SMP Dec 21 08:34:10 atf-124 kernel: [ 64.093618] last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb5/5-7/5-7.1/5-7. 1:1.0/bInterfaceClass Dec 21 08:34:10 atf-124 kernel: [ 64.093803] Modules linked in: bridge stp xen_evtchn xenfs vboxnetadp vboxnetflt vbox drv shpchp lp processor i5100_edac pci_hotplug psmouse parport acpi_processor button dcdbas edac_core evdev serio_raw ex t3 jbd mbcache sd_mod crc_t10dif sg dm_mod osst sr_mod cdrom st usbhid hid ata_generic mptspi mptsas mptscsih scsi_trans port_spi thermal ehci_hcd thermal_sys tg3 mptbase libphy scsi_transport_sas ata_piix libata uhci_hcd scsi_mod usbcore nl s_base radeonfb fb_ddc i2c_algo_bit i2c_core Dec 21 08:34:10 atf-124 kernel: [ 64.097010] Dec 21 08:34:10 atf-124 kernel: [ 64.097010] Pid: 2049, comm: event Not tainted (2.6.32-5-xen-686 #1) PowerEdge T300 Dec 21 08:34:10 atf-124 kernel: [ 64.097314] EIP: 0061:[<c1003abc>] EFLAGS: 00010282 CPU: 2 Dec 21 08:34:10 atf-124 kernel: [ 64.097314] EIP is at set_aliased_prot+0x9e/0x10d Dec 21 08:34:10 atf-124 kernel: [ 64.097314] EAX: ffffffea EBX: f8c2c000 ECX: dac2c063 EDX: 80000001 Dec 21 08:34:10 atf-124 kernel: [ 64.097314] ESI: 00000000 EDI: 80000000 EBP: 000cf400 ESP: f5e65a3c Dec 21 08:34:10 atf-124 kernel: [ 64.097314] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0069 Dec 21 08:34:10 atf-124 kernel: [ 64.097314] Process event (pid: 2049, ti=f5e64000 task=f67ef2c0 task.ti=f5e64000) Dec 21 08:34:10 atf-124 kernel: [ 64.097314] Stack: Dec 21 08:34:10 atf-124 kernel: [ 64.097314] 80000001 dac2c063 00000163 f8c2c000 c2e52000 00000001 00000200 f8c2c000 Dec 21 08:34:10 atf-124 kernel: [ 64.098291] <0> 00002000 f6438cc0 c1003b4d f5fe2fc0 f67ef2c0 f5fe2fc0 c100b20b f5fe2f c0 Dec 21 08:34:10 atf-124 kernel: [ 64.098817] <0> f5fe2fc0 c103556e 00000000 c103237c 00000000 c145ee20 f5fe2fc0 c1db2a 80 Dec 21 08:34:10 atf-124 kernel: [ 64.098817] Call Trace: Dec 21 08:34:10 atf-124 kernel: [ 64.101438] [<c1003b4d>] ? xen_free_ldt+0x22/0x30 Dec 21 08:34:10 atf-124 kernel: [ 64.102616] [<c100b20b>] ? destroy_context+0x38/0x79 Dec 21 08:34:10 atf-124 kernel: [ 64.105163] [<c103556e>] ? __mmdrop+0x1d/0x3a Dec 21 08:34:10 atf-124 kernel: [ 64.106067] [<c103237c>] ? finish_task_switch+0x76/0x95 Dec 21 08:34:10 atf-124 kernel: [ 64.108722] [<c128d169>] ? schedule+0x762/0x7dc Dec 21 08:34:10 atf-124 kernel: [ 64.110296] [<c1005fb4>] ? xen_force_evtchn_callback+0xc/0x10 Dec 21 08:34:10 atf-124 kernel: [ 64.111807] [<c128da90>] ? schedule_hrtimeout_range+0xa1/0xda Dec 21 08:34:10 atf-124 kernel: [ 64.114401] [<c104d652>] ? hrtimer_wakeup+0x0/0x18 Dec 21 08:34:10 atf-124 kernel: [ 64.115627] [<c104dfad>] ? hrtimer_start_range_ns+0xf/0x13 Dec 21 08:34:10 atf-124 kernel: [ 64.117920] [<c10c6c7e>] ? poll_schedule_timeout+0x26/0x3e Dec 21 08:34:10 atf-124 kernel: [ 64.117920] [<c10c75d2>] ? do_select+0x3e7/0x42d Dec 21 08:34:10 atf-124 kernel: [ 64.120657] [<c10d5f4c>] ? __getblk+0x3c/0x2f3 Dec 21 08:34:10 atf-124 kernel: [ 64.120657] [<c10c79be>] ? __pollwait+0x0/0xa5 Dec 21 08:34:10 atf-124 kernel: [ 64.120657] [<c10d8425>] ? __bread+0xa/0x5d Dec 21 08:34:10 atf-124 kernel: [ 64.126411] [<f8679f47>] ? ext3_get_branch+0x5d/0xc4 [ext3] Dec 21 08:34:10 atf-124 kernel: [ 64.127216] [<f867a730>] ? ext3_get_blocks_handle+0x8f/0x78a [ext3] Dec 21 08:34:10 atf-124 kernel: [ 64.130117] [<f867adf6>] ? ext3_get_blocks_handle+0x755/0x78a [ext3] Dec 21 08:34:10 atf-124 kernel: [ 64.131997] [<c1005fb4>] ? xen_force_evtchn_callback+0xc/0x10 Dec 21 08:34:10 atf-124 kernel: [ 64.132327] [<c10066dc>] ? check_events+0x8/0xc Dec 21 08:34:10 atf-124 kernel: [ 64.135358] [<c10ffffd>] ? ipc_lock+0x28/0x3b Dec 21 08:34:10 atf-124 kernel: [ 64.136474] [<c1102256>] ? semctl_main+0x36a/0x391 Dec 21 08:34:10 atf-124 kernel: [ 64.137804] [<c10066d3>] ? xen_restore_fl_direct_end+0x0/0x1 Dec 21 08:34:10 atf-124 kernel: [ 64.140186] [<c10b6ad8>] ? kmem_cache_alloc+0x79/0xe5 Dec 21 08:34:10 atf-124 kernel: [ 64.140186] [<f867aec8>] ? ext3_get_block+0x9d/0xd1 [ext3] Dec 21 08:34:10 atf-124 kernel: [ 64.140186] [<c1005fb4>] ? xen_force_evtchn_callback+0xc/0x10 Dec 21 08:34:10 atf-124 kernel: [ 64.145420] [<c10066dc>] ? check_events+0x8/0xc Dec 21 08:34:10 atf-124 kernel: [ 64.147354] [<c10b6ad8>] ? kmem_cache_alloc+0x79/0xe5 Dec 21 08:34:10 atf-124 kernel: [ 64.147868] [<c1005fb4>] ? xen_force_evtchn_callback+0xc/0x10 Dec 21 08:34:10 atf-124 kernel: [ 64.150255] [<f8646a97>] ? journal_stop+0x254/0x260 [jbd] Dec 21 08:34:10 atf-124 kernel: [ 64.150255] [<c10066dc>] ? check_events+0x8/0xc Dec 21 08:34:10 atf-124 kernel: [ 64.153063] [<c10066d3>] ? xen_restore_fl_direct_end+0x0/0x1 Dec 21 08:34:10 atf-124 kernel: [ 64.155481] [<c10b6a32>] ? kmem_cache_free+0x82/0xaf Dec 21 08:34:10 atf-124 kernel: [ 64.157422] [<f8646a97>] ? journal_stop+0x254/0x260 [jbd] Dec 21 08:34:10 atf-124 kernel: [ 64.157930] [<f8678e4c>] ? walk_page_buffers+0x4c/0x65 [ext3] Dec 21 08:34:10 atf-124 kernel: [ 64.160323] [<f867bfe8>] ? ext3_ordered_write_end+0x11c/0x141 [ext3] Dec 21 08:34:10 atf-124 kernel: [ 64.160323] [<c108f4d2>] ? generic_file_buffered_write+0x12f/0x21d Dec 21 08:34:10 atf-124 kernel: [ 64.160323] [<c108f52d>] ? generic_file_buffered_write+0x18a/0x21d Dec 21 08:34:10 atf-124 kernel: [ 64.160323] [<c10d170c>] ? __mark_inode_dirty+0x20/0x10b Dec 21 08:34:10 atf-124 kernel: [ 64.165951] [<c108f9bd>] ? __generic_file_aio_write+0x265/0x28d Dec 21 08:34:10 atf-124 kernel: [ 64.167994] [<c10c7756>] ? core_sys_select+0x13e/0x1c2 Dec 21 08:34:10 atf-124 kernel: [ 64.167994] [<c103b025>] ? current_fs_time+0x13/0x15 Dec 21 08:34:10 atf-124 kernel: [ 64.170862] [<c108fa63>] ? generic_file_aio_write+0x7e/0x93 Dec 21 08:34:10 atf-124 kernel: [ 64.170862] [<c1144183>] ? copy_to_user+0x29/0xf8 Dec 21 08:34:10 atf-124 kernel: [ 64.170862] [<c1021283>] ? pvclock_clocksource_read+0xf9/0x10f Dec 21 08:34:10 atf-124 kernel: [ 64.170862] [<c1021283>] ? pvclock_clocksource_read+0xf9/0x10f Dec 21 08:34:10 atf-124 kernel: [ 64.176019] [<c10521d0>] ? ktime_get_ts+0xcd/0xd5 Dec 21 08:34:10 atf-124 kernel: [ 64.177561] [<c10c799d>] ? sys_select+0x6e/0x8f Dec 21 08:34:10 atf-124 kernel: [ 64.178057] [<c1008e1b>] ? sysenter_do_call+0x12/0x28 Dec 21 08:34:10 atf-124 kernel: [ 64.179269] Code: ea 0c c1 e0 0c 09 d1 09 c3 89 ca 89 d8 ff 15 8c fe 3c c1 31 f6 89 c 1 8b 5c 24 0c 89 44 24 04 89 14 24 e8 08 e7 ff ff 85 c0 74 04 <0f> 0b eb fe 8b 54 24 10 89 e8 c1 e0 05 8b 04 10 c1 e8 1e 69 c0 Dec 21 08:34:10 atf-124 kernel: [ 64.185641] EIP: [<c1003abc>] set_aliased_prot+0x9e/0x10d SS:ESP 0069:f5e65a3c Dec 21 08:34:10 atf-124 kernel: [ 64.186831] ---[ end trace 004b350ae1ecd955 ]--- -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". 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