On 24/07/2019 10:13, Juergen Gross wrote:
> The fix is a one-liner. :-)
>
> diff --git a/xen/common/schedule.c b/xen/common/schedule.c
> index f0bc5b3161..da9efb147f 100644
> --- a/xen/common/schedule.c
> +++ b/xen/common/schedule.c
> @@ -2207,6 +2207,7 @@ static struct sched_unit
> *sched_wait_rendezvous_in(struct sched_unit *prev,
> if ( unlikely(!scheduler_active) )
> {
> ASSERT(is_idle_unit(prev));
> + atomic_set(&prev->next_task->rendezvous_out_cnt, 0);
> prev->rendezvous_in_cnt = 0;
> }
> }
Even with that applied, I'm still seeing it :(
(XEN) [ 311.223780] Watchdog timer detects that CPU1 is stuck!
(XEN) [ 311.229413] ----[ Xen-4.13.0 x86_64 debug=y Not tainted ]----
(XEN) [ 311.236002] CPU: 1
(XEN) [ 311.238774] RIP: e008:[<ffff82d0802408a8>]
sched_context_switched+0x92/0x101
(XEN) [ 311.246575] RFLAGS: 0000000000000202 CONTEXT: hypervisor
(XEN) [ 311.252556] rax: 0000000000000002 rbx: ffff83081cc635b0 rcx:
0000000000000001
(XEN) [ 311.260530] rdx: ffff83081cc63634 rsi: ffff83081cc8f000 rdi:
ffff83081cc8f000
(XEN) [ 311.268502] rbp: ffff83081cc87df0 rsp: ffff83081cc87dd0 r8:
0000000000000000
(XEN) [ 311.276474] r9: ffff83081cc62000 r10: ffff83081cc62000 r11:
ffff83081cc6b000
(XEN) [ 311.284448] r12: ffff83081cc8f000 r13: ffff83081cc8f000 r14:
ffff83081cc61e80
(XEN) [ 311.292422] r15: ffff82d0805e2260 cr0: 000000008005003b cr4:
00000000001526e0
(XEN) [ 311.300395] cr3: 00000000dd4ac000 cr2: 0000559b05a94048
(XEN) [ 311.306288] fsb: 0000000000000000 gsb: ffff8880a3940000 gss:
0000000000000000
(XEN) [ 311.314262] ds: 002b es: 002b fs: 0000 gs: 0000 ss: e010 cs:
e008
(XEN) [ 311.321716] Xen code around <ffff82d0802408a8>
(sched_context_switched+0x92/0x101):
(XEN) [ 311.329862] 85 c0 74 08 f3 90 8b 02 <85> c0 75 f8 49 8b 44 24 10 66
81 38 ff 7f 75 05
(XEN) [ 311.338269] Xen stack trace from rsp=ffff83081cc87dd0:
(XEN) [ 311.343904] ffff83081cc8f000 ffff83081cc8f000 0000000000000000
ffff83081cc635b0
(XEN) [ 311.351963] ffff83081cc87e28 ffff82d080240996 ffff83081cc61e98
ffff82d08060a4a8
(XEN) [ 311.360022] ffff83081cc61e98 ffff82d08060a4a8 ffff83081cc635b0
ffff83081cc87e80
(XEN) [ 311.368083] ffff82d080240f7a 0000000000000001 ffff83081cc8f000
00000047588837ec
(XEN) [ 311.376142] 000000011cc87ec0 ffff82d0805c3a00 ffff82d0805c3980
ffffffffffffffff
(XEN) [ 311.384205] ffff82d0805d3980 ffff82d0805e2260 ffff83081cc87eb0
ffff82d08024274a
(XEN) [ 311.392263] 0000000000000001 ffff82d0805c3a00 0000000000000001
0000000000000001
(XEN) [ 311.400324] ffff83081cc87ec0 ffff82d0802427bf ffff83081cc87ef0
ffff82d080279a1d
(XEN) [ 311.408385] ffff83081cc8f000 ffff83081cc8f000 0000000000000001
ffff83081cc635b0
(XEN) [ 311.416443] ffff83081cc87df0 ffff88809ee1ba00 ffff88809ee1ba00
0000000000000000
(XEN) [ 311.424504] 0000000000000000 0000000000000005 ffff88809ee1ba00
0000000000000246
(XEN) [ 311.432563] aaaaaaaaaaaaaaaa 0000000000000000 000000000001ca00
0000000000000000
(XEN) [ 311.440625] ffffffff810013aa ffffffff8203c190 deadbeefdeadf00d
deadbeefdeadf00d
(XEN) [ 311.448685] 0000010000000000 ffffffff810013aa 000000000000e033
0000000000000246
(XEN) [ 311.456747] ffffc900400bfeb0 000000000000e02b 000000000000beef
000000000000beef
(XEN) [ 311.464807] 000000000000beef 000000000000beef 0000e01000000001
ffff83081cc8f000
(XEN) [ 311.472864] 000000379c665d00 00000000001526e0 0000000000000000
0000000000000000
(XEN) [ 311.480926] 0000060000000000 0000000000000000
(XEN) [ 311.486041] Xen call trace:
(XEN) [ 311.489332] [<ffff82d0802408a8>] sched_context_switched+0x92/0x101
(XEN) [ 311.496266] [<ffff82d080240996>]
schedule.c#sched_context_switch+0x7f/0x160
(XEN) [ 311.503980] [<ffff82d080240f7a>] schedule.c#sched_slave+0x28f/0x2b5
(XEN) [ 311.510999] [<ffff82d08024274a>] softirq.c#__do_softirq+0x61/0x8c
(XEN) [ 311.517846] [<ffff82d0802427bf>] do_softirq+0x13/0x15
(XEN) [ 311.523653] [<ffff82d080279a1d>] domain.c#idle_loop+0x52/0xa7
(XEN) [ 311.530152]
(XEN) [ 311.532144] CPU0 @ e008:ffff82d08024334d
(stop_machine.c#stopmachine_wait_state+0x19/0x24)
(XEN) [ 311.540899] CPU5 @ e008:ffff82d080243398
(stop_machine.c#stopmachine_action+0x40/0x93)
(XEN) [ 311.549307] CPU3 @ e008:ffff82d08024339e
(stop_machine.c#stopmachine_action+0x46/0x93)
(XEN) [ 311.557712] CPU4 @ e008:ffff82d08024339e
(stop_machine.c#stopmachine_action+0x46/0x93)
(XEN) [ 311.566119] CPU7 @ e008:ffff82d08024339e
(stop_machine.c#stopmachine_action+0x46/0x93)
(XEN) [ 311.574526] CPU2 @ e008:ffff82d080243398
(stop_machine.c#stopmachine_action+0x40/0x93)
(XEN) [ 311.582931] CPU6 @ e008:ffff82d080243398
(stop_machine.c#stopmachine_action+0x40/0x93)
(XEN) [ 311.591919]
(XEN) [ 311.593914] ****************************************
(XEN) [ 311.599374] Panic on CPU 1:
(XEN) [ 311.602669] FATAL TRAP: vector = 2 (nmi)
(XEN) [ 311.607088] [error_code=0000]
(XEN) [ 311.610641] ****************************************
(XEN) [ 311.616101]
(XEN) [ 311.618095] Reboot in five seconds...
(XEN) [ 311.622254] Executing kexec image on cpu1
(XEN) [ 311.627534] Shot down all CPUs
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