From: Marc Zyngier <maz@kernel.org>
To: David Laight <david.laight.linux@gmail.com>
Cc: Boqun Feng <boqun@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Ingo Molnar <mingo@redhat.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Lorenzo Pieralisi <lpieralisi@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Huth <thuth@redhat.com>, Waiman Long <longman@redhat.com>,
Will Deacon <will@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: osq_lock on arm64
Date: Sun, 15 Mar 2026 22:02:54 +0000 [thread overview]
Message-ID: <87h5qgda41.wl-maz@kernel.org> (raw)
In-Reply-To: <20260315201153.1d2ae1e3@pumpkin>
On Sun, 15 Mar 2026 20:11:53 +0000,
David Laight <david.laight.linux@gmail.com> wrote:
[...]
> The documentation I found for the arm64 instruction set doesn't mention that
> losing the exclusive access requested by ldx will wake wfe, I assume that
> is an omission from the docs?
R_XRZRK explicitly calls for "The clearing of the global monitor for
the PE." as a something that sets the event register, and therefore
acts as a wake-up event from WFE.
M.
--
Jazz isn't dead. It just smells funny.
prev parent reply other threads:[~2026-03-15 22:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-15 20:11 osq_lock on arm64 David Laight
2026-03-15 22:02 ` Marc Zyngier [this message]
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