Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 14 Mar 2023 11:04:00 +0000 | From | Cristian Marussi <> | Subject | Re: Circular lockdep in kvm_reset_vcpu() ? |
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On Tue, Mar 14, 2023 at 09:28:25AM +0000, Marc Zyngier wrote: > On 2023-03-13 18:20, Cristian Marussi wrote: > > On Mon, Mar 13, 2023 at 02:09:55PM +0000, Marc Zyngier wrote: > > > > And -rc2 works just fine here. > > > > Thanks, I'll dig deeper what's going on un my setup. > > Actually, you really want this patch[1] which is on its > way to Linus. > > It could explain the issue you're seeing with SMP.
Hi Marc,
thanks this just solves for me on JUNO with guest SMP.
Indeed with earlycon on JUNO with SMP I was seeing, beside a lot of workqueue lockup that finally hanged the guest, some puzzling 'time-traveling' stamps that seemed to align more with the host time than the guest.
[ 0.509305] thermal_sys: Registered thermal governor 'step_wise' [ 0.509327] thermal_sys: Registered thermal governor 'power_allocator' [ 282.404523] audit: type=2000 audit(0.372:1): state=initialized audit_enabled=0 res=1 [ 0.526380] cpuidle: using governor menu [ 0.530378] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers. [ 0.536241] ASID allocator initialised with 65536 entries [ 0.547455] Serial: AMBA PL011 UART driver [ 0.563267] Callback from call_rcu_tasks() invoked. [ 282.463816] KASLR disabled due to lack of seed [ 282.470356] HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages [ 282.476182] HugeTLB: 0 KiB vmemmap can be freed for a 1.00 GiB page .... ..... [ 345.799753] io scheduler bfq registered [ 126.753573] watchdog: BUG: soft lockup - CPU#0 stuck for 118s! [kworker/u4:0:9] [ 126.759801] Modules linked in: [ 126.762397] irq event stamp: 713
Thanks a lot for the help. Cristian
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