From: "Jan Beulich" <JBeulich@suse.com>
To: Sergey Dyasli <sergey.dyasli@citrix.com>
Cc: Kevin Tian <kevin.tian@intel.com>,
"Kevin.Mayer@gdata.de" <Kevin.Mayer@gdata.de>,
Andrew Cooper <Andrew.Cooper3@citrix.com>,
Anshul Makkar <anshul.makkar@citrix.com>,
"jun.nakajima@intel.com" <jun.nakajima@intel.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH 1/2] VMX: fix VMCS race on context-switch paths
Date: Wed, 15 Feb 2017 04:39:04 -0700 [thread overview]
Message-ID: <58A44BE8020000780013A2E2@prv-mh.provo.novell.com> (raw)
In-Reply-To: <1487154433.3588.1.camel@citrix.com>
>>> On 15.02.17 at 11:27, <sergey.dyasli@citrix.com> wrote:
> This is what I'm getting during the original test case (32 VMs reboot):
>
> (XEN) [ 1407.789329] Watchdog timer detects that CPU12 is stuck!
> (XEN) [ 1407.795726] ----[ Xen-4.6.1-xs-local x86_64 debug=n Not tainted ]----
> (XEN) [ 1407.803774] CPU: 12
> (XEN) [ 1407.806975] RIP: e008:[<ffff82d0801ea2a2>]
> vmx_vmcs_reload+0x32/0x50
> (XEN) [ 1407.814926] RFLAGS: 0000000000000013 CONTEXT: hypervisor (d230v0)
> (XEN) [ 1407.822486] rax: 0000000000000000 rbx: ffff830079ee7000 rcx: 0000000000000000
> (XEN) [ 1407.831407] rdx: 0000006f8f72ce00 rsi: ffff8329b3efbfe8 rdi: ffff830079ee7000
> (XEN) [ 1407.840326] rbp: ffff83007bab7000 rsp: ffff83400fab7dc8 r8: 000001468e9e3ccc
> (XEN) [ 1407.849246] r9: ffff83403ffe7000 r10: 00000146c91c1737 r11: ffff833a9558c310
> (XEN) [ 1407.858166] r12: ffff833a9558c000 r13: 000000000000000c r14: ffff83403ffe7000
> (XEN) [ 1407.867085] r15: ffff82d080364640 cr0: 0000000080050033 cr4: 00000000003526e0
> (XEN) [ 1407.876005] cr3: 000000294b074000 cr2: 000007fefd7ce150
> (XEN) [ 1407.882599] ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: 0000 cs: e008
> (XEN) [ 1407.890938] Xen code around <ffff82d0801ea2a2>
> (vmx_vmcs_reload+0x32/0x50):
> (XEN) [ 1407.899277] 84 00 00 00 00 00 f3 90 <83> bf e8 05 00 00 ff 75 f5 e9 a0 fa ff ff f3 c3
> (XEN) [ 1407.908679] Xen stack trace from rsp=ffff83400fab7dc8:
> (XEN) [ 1407.914982] ffff82d08016c58d 0000000000001000 0000000000000000 0000000000000000
> (XEN) [ 1407.923998] 0000000000000206 0000000000000086 0000000000000286 000000000000000c
> (XEN) [ 1407.933017] ffff83007bab7058 ffff82d080364640 ffff83007bab7000 00000146a7f26495
> (XEN) [ 1407.942032] ffff830079ee7000 ffff833a9558cf84 ffff833a9558c000 ffff82d080364640
> (XEN) [ 1407.951048] ffff82d08012fb8e ffff83400fabda98 ffff83400faba148 ffff83403ffe7000
> (XEN) [ 1407.960067] ffff83400faba160 ffff83400fabda40 ffff82d080164305 000000000000000c
> (XEN) [ 1407.969083] ffff830079ee7000 0000000001c9c380 ffff82d080136400 000000440000011d
> (XEN) [ 1407.978101] 00000000ffffffff ffffffffffffffff ffff83400fab0000 ffff82d080348d00
> (XEN) [ 1407.987116] ffff833a9558c000 ffff82d080364640 ffff82d08013311c ffff830079ee7000
> (XEN) [ 1407.996134] ffff83400fab0000 ffff830079ee7000 ffff83403ffe7000 00000000ffffffff
> (XEN) [ 1408.005151] ffff82d080167d35 ffff83007bab7000 0000000000000001 fffffa80077f9700
> (XEN) [ 1408.014167] fffffa80075bf900 fffffa80077f9820 0000000000000000 0000000000000000
> (XEN) [ 1408.023184] fffffa8008889c00 0000000002fa1e78 0000003b6ed18d78 0000000000000000
> (XEN) [ 1408.032202] 00000000068e7780 fffffa80075ba790 fffffa80077f9848 fffff800027f9e80
> (XEN) [ 1408.041220] 0000000000000001 000000fc00000000 fffff880042499c2 0000000000000000
> (XEN) [ 1408.050235] 0000000000000246 fffff80000b9cb58 0000000000000000 80248e00e008e1f0
> (XEN) [ 1408.059253] 00000000ffff82d0 80248e00e008e200 00000000ffff82d0 80248e000000000c
> (XEN) [ 1408.068268] ffff830079ee7000 0000006f8f72ce00 00000000ffff82d0
> (XEN) [ 1408.075638] Xen call trace:
> (XEN) [ 1408.079322] [<ffff82d0801ea2a2>] vmx_vmcs_reload+0x32/0x50
> (XEN) [ 1408.086303] [<ffff82d08016c58d>] context_switch+0x85d/0xeb0
> (XEN) [ 1408.093380] [<ffff82d08012fb8e>] schedule.c#schedule+0x46e/0x7d0
> (XEN) [ 1408.100942] [<ffff82d080164305>] reprogram_timer+0x75/0xe0
> (XEN) [ 1408.107925] [<ffff82d080136400>] timer.c#timer_softirq_action+0x90/0x210
> (XEN) [ 1408.116263] [<ffff82d08013311c>] softirq.c#__do_softirq+0x5c/0x90
> (XEN) [ 1408.123921] [<ffff82d080167d35>] domain.c#idle_loop+0x25/0x60
Taking your later reply into account - were you able to figure out
what other party held onto the VMCS being waited for here?
Jan
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next prev parent reply other threads:[~2017-02-15 11:39 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-14 10:23 [PATCH 0/2] x86: context switch handling adjustments Jan Beulich
2017-02-14 10:28 ` [PATCH 1/2] VMX: fix VMCS race on context-switch paths Jan Beulich
2017-02-14 15:16 ` Andrew Cooper
2017-02-15 8:37 ` Jan Beulich
2017-02-15 11:29 ` Andrew Cooper
2017-02-15 10:27 ` Sergey Dyasli
2017-02-15 11:00 ` Jan Beulich
2017-02-15 11:13 ` Sergey Dyasli
2017-02-15 11:24 ` Jan Beulich
2017-02-15 11:39 ` Jan Beulich [this message]
2017-02-15 11:48 ` Sergey Dyasli
2017-02-15 11:55 ` Jan Beulich
2017-02-15 13:03 ` Jan Beulich
2017-02-15 13:40 ` Sergey Dyasli
2017-02-15 14:29 ` Jan Beulich
2017-02-15 14:44 ` Jan Beulich
2017-02-15 13:20 ` Jan Beulich
2017-02-15 14:55 ` Sergey Dyasli
2017-02-15 15:15 ` Jan Beulich
2017-02-16 8:29 ` Sergey Dyasli
2017-02-16 9:26 ` Jan Beulich
2017-02-14 10:29 ` [PATCH 2/2] x86: package up context switch hook pointers Jan Beulich
2017-02-14 15:26 ` Andrew Cooper
2017-02-15 8:42 ` Jan Beulich
2017-02-15 11:34 ` Andrew Cooper
2017-02-15 11:40 ` Jan Beulich
2017-02-14 22:18 ` Boris Ostrovsky
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