From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Sean Christopherson <seanjc@google.com>
Cc: David Woodhouse <dwmw@amazon.co.uk>,
"rostedt@goodmis.org" <rostedt@goodmis.org>,
"shaikhkamal2012@gmail.com" <shaikhkamal2012@gmail.com>,
"syzbot+919877893c9d28162dc2@syzkaller.appspotmail.com"
<syzbot+919877893c9d28162dc2@syzkaller.appspotmail.com>,
"me@brighamcampbell.com" <me@brighamcampbell.com>,
"linux-rt-devel@lists.linux.dev" <linux-rt-devel@lists.linux.dev>,
"hpa@zytor.com" <hpa@zytor.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"paul@xen.org" <paul@xen.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"skhan@linuxfoundation.org" <skhan@linuxfoundation.org>
Subject: Re: [PATCH] KVM: x86/xen: Fix sleeping lock in hard IRQ context on PREEMPT_RT
Date: Thu, 2 Apr 2026 08:42:09 +0200 [thread overview]
Message-ID: <20260402064209.8ba7wrBI@linutronix.de> (raw)
In-Reply-To: <ac08V4TaM2yh9SY1@google.com>
On 2026-04-01 08:40:07 [-0700], Sean Christopherson wrote:
> Re-reading through the thread where you proposed using trylock, and through
> commit bbe17c625d68 ("KVM: x86/xen: Fix potential deadlock in kvm_xen_update_runstate_guest()"),
> I think I agree with using trylock for "fast" paths.
Has bbe17c625d68 been applied for PREEMPT_RT reasons?
Sebastian
next prev parent reply other threads:[~2026-04-02 6:42 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-29 13:15 [PATCH] KVM: x86/xen: Fix sleeping lock in hard IRQ context on PREEMPT_RT shaikh.kamal
2026-03-30 14:18 ` Steven Rostedt
2026-03-30 14:51 ` Woodhouse, David
2026-04-01 15:40 ` Sean Christopherson
2026-04-02 1:30 ` [PATCH v2 0/1] KVM: x86/xen: Fix PREEMPT_RT sleeping lock bug shaikh.kamal
2026-04-02 1:31 ` [PATCH v2 1/1] KVM: x86/xen: Use trylock for fast path event channel delivery shaikh.kamal
2026-04-02 6:36 ` Sebastian Andrzej Siewior
2026-04-02 22:40 ` Sean Christopherson
2026-04-02 6:42 ` Sebastian Andrzej Siewior [this message]
2026-04-02 22:23 ` [PATCH] KVM: x86/xen: Fix sleeping lock in hard IRQ context on PREEMPT_RT Sean Christopherson
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