From: David Woodhouse <dwmw2@infradead.org>
To: Sean Christopherson <seanjc@google.com>
Cc: James Houghton <jthoughton@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
kvm@vger.kernel.org, linux-rt-devel@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: Re: KVM: x86/mmu: __kvm_rmap_lock() preemption assert trips on PREEMPT_RT
Date: Thu, 27 Aug 2026 22:58:56 +0100 [thread overview]
Message-ID: <0bab7b4331aab38ee1d174a7b402bcda7684b50f.camel@infradead.org> (raw)
In-Reply-To: <apCwV7xenDh2qmr7@google.com>
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On Thu, 2026-08-27 at 14:47 -0700, Sean Christopherson wrote:
> I'll take it for a spin, unless someone has a better idea.
Heh, no pun intended?
> - lockdep_assert_preemption_disabled();
> + if (IS_ENABLED(CONFIG_PREEMPT_RT))
> + lockdep_assert_preemption_disabled();
> + else
> + lockdep_assert_held(&kvm->mmu_lock);
Other way round?
I'll fix that and throw it on top of my GPC/RT/RCU torture tests.
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next prev parent reply other threads:[~2026-08-27 21:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-27 21:13 KVM: x86/mmu: __kvm_rmap_lock() preemption assert trips on PREEMPT_RT David Woodhouse
2026-08-27 21:47 ` Sean Christopherson
2026-08-27 21:58 ` David Woodhouse [this message]
2026-08-27 22:17 ` Sean Christopherson
2026-08-28 10:45 ` Sebastian Andrzej Siewior
2026-08-28 11:16 ` David Woodhouse
2026-08-28 14:23 ` Sean Christopherson
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