Tested with the latest upstream trusty kernel version as requested --
Linux 3.13.11-03131104-generic #201406201536 SMP Fri Jun 20 19:37:17
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Seeing similar behavior there with things like:
[88719.002167] INFO: task qemu-system-x86:215923 blocked for more than 120
seconds.
[88719.009603] Not tainted 3.13.11-03131104-generic #201406201536
[88719.015985] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[88719.023857] qemu-system-x86 D ffffffff818114c0 0 215923 1 0x00000000
[88719.023859] ffff881e43703d30 0000000000000002 ffffffff81091670
ffff881e43703fd8
[88719.023862] 0000000000014440 0000000000014440 ffff881fd2c0afe0
ffff881e435dc7d0
[88719.023864] ffffffff81091748 ffff881e435dc7d0 ffff883fd1633160
ffff883fd1633168
[88719.023867] Call Trace:
[88719.023869] [<ffffffff81091670>] ? lock_hrtimer_base.isra.24+0x30/0x60
[88719.023871] [<ffffffff81091748>] ? hrtimer_try_to_cancel+0x58/0x110
[88719.023874] [<ffffffff8174c5e9>] schedule+0x29/0x70
[88719.023876] [<ffffffff8174efc5>] rwsem_down_read_failed+0xb5/0x140
[88719.023881] [<ffffffff81091822>] ? hrtimer_cancel+0x22/0x30
[88719.023889] [<ffffffff813780b4>] call_rwsem_down_read_failed+0x14/0x30
[88719.023892] [<ffffffff8174ea74>] ? down_read+0x24/0x30
[88719.023895] [<ffffffff8175439a>] __do_page_fault+0x20a/0x570
[88719.023897] [<ffffffff81116d6c>] ? acct_account_cputime+0x1c/0x20
[88719.023900] [<ffffffff810a1099>] ? account_user_time+0x99/0xb0
[88719.023902] [<ffffffff810a171d>] ? vtime_account_user+0x5d/0x70
[88719.023904] [<ffffffff8175471a>] do_page_fault+0x1a/0x70
[88719.023906] [<ffffffff81750888>] page_fault+0x28/0x30
---
and the VMs with hyperv enabled see the delay: [kernel 3.11]
[80683.552092] INFO: rcu_sched self-detected stall on CPU { 0} (t=15897
jiffies g=315984 c=315983 q=0)
and [kernel 2.6]
hrtimer: interrupt took 3950739 ns
Clocksource tsc unstable (delta = -8589936825 ns)
Not seeing this at all with kernel 3.12.
Added tags kernel-bug-exists-upstream kernel-bug-exists-
upstream-3.13.11-03131104-generic as requested.
** Tags added: kernel-bug-exists-upstream kernel-bug-exists-
upstream-3.13.11-03131104-generic
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1332409
Title:
[Supermicro X9DR3-F] Virtual machines hang in kernel 3.13
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