I've done a test with Debian 6.0 and it works fine (no crash/lost network connection) on vmotion with XenServer 5.6 FP1. Debian included this patch in their last kernel:
[ Ian Campbell ] * xen: blkback: fix potential leak of kernel thread. (CVE-2010-3699) Their prior last kernel linux-2.6 (2.6.32-30) didn't work. Their actual kernel linux-2.6 (2.6.32-31), that includes this patch, works. I've tested this Debian kernel with Ubuntu 10.04 and it works fine (no crash/lost network connection) on vmotion. Can this patch be applied to the Ubuntu 10.04 kernel? ** CVE added: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2010-3699 ** Description changed: Binary package hint: linux-image-2.6.32-25-generic When using one processor trying to migrate the Ubuntu Guest from Hosts it dumps: [518258.206396] INFO: task xenwatch:12 blocked for more than 120 seconds. [518258.206405] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [518258.206412] xenwatch D ffff88000294cbc0 0 12 2 0x00000000 [518258.206417] ffff88007dfe5bf0 0000000000000246 0000000000015bc0 0000000000015bc0 [518258.206423] ffff88007dfd9ab0 ffff88007dfe5fd8 0000000000015bc0 ffff88007dfd96f0 [518258.206428] 0000000000015bc0 ffff88007dfe5fd8 0000000000015bc0 ffff88007dfd9ab0 [518258.206434] Call Trace: [518258.206443] [<ffffffff8155a0be>] ? _spin_unlock_irqrestore+0x1e/0x30 [518258.206448] [<ffffffff8155841d>] schedule_timeout+0x22d/0x300 [518258.206454] [<ffffffff8100f302>] ? check_events+0x12/0x20 [518258.206459] [<ffffffff8106085f>] ? __enqueue_rt_entity+0x11f/0x220 [518258.206463] [<ffffffff8105a616>] ? update_curr+0xe6/0x1e0 [518258.206466] [<ffffffff815576c6>] wait_for_common+0xd6/0x180 [518258.206470] [<ffffffff8105a350>] ? default_wake_function+0x0/0x20 [518258.206474] [<ffffffff8155782d>] wait_for_completion+0x1d/0x20 [518258.206478] [<ffffffff81083f1b>] kthread_stop+0x4b/0xd0 [518258.206482] [<ffffffff8108724f>] ? hrtimer_force_reprogram+0x7f/0x90 [518258.206487] [<ffffffff8107fbbe>] cleanup_workqueue_thread+0x3e/0x80 [518258.206490] [<ffffffff8107fda3>] destroy_workqueue+0x93/0xe0 [518258.206495] [<ffffffff810b5764>] stop_machine_destroy+0x34/0x50 [518258.206499] [<ffffffff8131ff7f>] do_suspend+0xaf/0x120 [518258.206502] [<ffffffff813200f9>] shutdown_handler+0x109/0x160 [518258.206505] [<ffffffff81321472>] xenwatch_thread+0xc2/0x190 [518258.206509] [<ffffffff81084240>] ? autoremove_wake_function+0x0/0x40 [518258.206512] [<ffffffff813213b0>] ? xenwatch_thread+0x0/0x190 [518258.206515] [<ffffffff81083ec6>] kthread+0x96/0xa0 [518258.206519] [<ffffffff810131ea>] child_rip+0xa/0x20 [518258.206523] [<ffffffff810123d1>] ? int_ret_from_sys_call+0x7/0x1b [518258.206526] [<ffffffff81012b5d>] ? retint_restore_args+0x5/0x6 [518258.206530] [<ffffffff810131e0>] ? child_rip+0x0/0x20 Using more processors, the VM just freezes (can't access from console or network) or lose Disk IO and Network connection. I've tried the kernel http://kernel.ubuntu.com/~kernel- ppa/mainline/v2.6.33.5-lucid/linux- image-2.6.33-02063305-generic_2.6.33-02063305_amd64.deb and the problem doesn't happen in this kernel. I'm using XenServer 5.6 Build 31188p - - I'm trying to use some old kernels and backporting some patches from the 2.6.33 but I'm not successful. + I'm trying to use some old kernels and backporting some patches from the + 2.6.33 but I'm not successful. I'm gonna still try to fix it, but any help will be appreciated. Best regards, -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/681083 Title: Ubuntu Crashes/Freeze on XenMotion -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
