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>
[-- Attachment #1: Type: text/plain, Size: 421 bytes --]
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.
[-- Attachment #2: smime.p7s --]
[-- Type: application/pkcs7-signature, Size: 6179 bytes --]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=0bab7b4331aab38ee1d174a7b402bcda7684b50f.camel@infradead.org \
--to=dwmw2@infradead.org \
--cc=bigeasy@linutronix.de \
--cc=jthoughton@google.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rt-devel@lists.linux.dev \
--cc=pbonzini@redhat.com \
--cc=seanjc@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.