From: Cristian Marussi <cristian.marussi@arm.com>
To: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>,
Jeremy Linton <jeremy.linton@arm.com>,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
linux-kernel@vger.kernel.org, David Woodhouse <dwmw@amazon.co.uk>
Subject: Re: Circular lockdep in kvm_reset_vcpu() ?
Date: Tue, 14 Mar 2023 11:04:00 +0000 [thread overview]
Message-ID: <ZBBUoBsfGokxiBzC@e120937-lin> (raw)
In-Reply-To: <82978ec75c0b34203dd1df693e7adf83@kernel.org>
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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next prev parent reply other threads:[~2023-03-14 12:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-10 17:46 Circular lockdep in kvm_reset_vcpu() ? Jeremy Linton
2023-02-11 0:56 ` Oliver Upton
2023-03-13 10:09 ` Cristian Marussi
2023-03-13 14:09 ` Marc Zyngier
2023-03-13 18:20 ` Cristian Marussi
[not found] ` <82978ec75c0b34203dd1df693e7adf83@kernel.org>
2023-03-14 11:04 ` Cristian Marussi [this message]
2023-03-14 11:42 ` Marc Zyngier
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