From: Marcelo Tosatti <mtosatti@redhat.com>
To: Andrey Korolyov <andrey@xdel.ru>
Cc: kvm@vger.kernel.org
Subject: Re: windows 2008 guest causing rcu_shed to emit NMI
Date: Wed, 23 Jan 2013 22:52:26 -0200 [thread overview]
Message-ID: <20130124005226.GB5479@amt.cnet> (raw)
In-Reply-To: <CABYiri-CCSWvEWvrhwuVQHYq4_xa1=sJyUPfjwYLE43yC+KOaQ@mail.gmail.com>
On Tue, Jan 22, 2013 at 09:00:25PM +0300, Andrey Korolyov wrote:
> Hi,
>
> problem described in the title happens on heavy I/O pressure on the
> host, without idle=poll trace almost always is the same, involving
> mwait, with poll and nohz=off RIP varies from time to time, at the
> previous hang it was tg_throttle_down, rather than test_ti_thread_flag
> in attached one. Both possible clocksource drivers, hpet and tsc, able
> to reproduce that with equal probability. VMs are pinned over one of
> two numa sets on two-head machine, mean emulator thread and each of
> vcpu threads has its own cpuset cg with '0-5,12-17' or '6-11,18-23'.
> I`ll appreciate any suggestions to try.
Andrey,
Can you reproduce with an upstream kernel? Commit
5cfc2aabcb282f fixes a livelock.
d2 75 c3 eb 03 41 89 c6 48 83 c4 18 44 89 f0 5b 5d 41 5c 41 5d 41 5e 41
5f c3 <31> c0 c3 48 63 ff 48 c7 c2 80 37 01 00 48 8b 0c fd e0 d6 68 81
[12738.508644] Call Trace:
[12738.508648] [<ffffffff81035a66>] ? walk_tg_tree_from+0x70/0x99
[12738.508652] [<ffffffff81014c03>] ? __switch_to_xtra+0x14c/0x160
[12738.508656] [<ffffffff8103bcce>] ? throttle_cfs_rq+0x4d/0x109
[12738.508660] [<ffffffff8103be70>] ? put_prev_task_fair+0x3f/0x65
[12738.508663] [<ffffffff8134c8ae>] ? __schedule+0x32e/0x5c3
[12738.508666] [<ffffffff8134ceee>] ? yield_to+0xfa/0x10c
[12738.508669] [<ffffffff8105d5af>] ? atomic_inc+0x3/0x4
[12738.508678] [<ffffffffa03a8fc4>] ? kvm_vcpu_on_spin+0x8c/0xf7 [kvm]
[12738.508684] [<ffffffffa030602f>] ? handle_pause+0x11/0x18
next prev parent reply other threads:[~2013-01-24 0:53 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-22 18:00 windows 2008 guest causing rcu_shed to emit NMI Andrey Korolyov
2013-01-24 0:52 ` Marcelo Tosatti [this message]
2013-01-24 10:54 ` Andrey Korolyov
2013-01-24 12:20 ` Marcelo Tosatti
2013-01-25 7:45 ` Andrey Korolyov
2013-01-25 20:49 ` Marcelo Tosatti
2013-01-27 21:04 ` Andrey Korolyov
[not found] ` <20130127231447.GB14721@amt.cnet>
2013-01-28 13:56 ` Andrey Korolyov
2013-01-28 23:35 ` Andrey Korolyov
[not found] ` <20130129231546.GA29904@amt.cnet>
2013-01-30 8:21 ` Andrey Korolyov
2013-01-30 20:11 ` Marcelo Tosatti
2013-01-31 17:40 ` Andrey Korolyov
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