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From: Peter Maydell <peter.maydell@linaro.org>
To: "Scott J. Goldman" <scottjgo@gmail.com>
Cc: Mohamed Mediouni <mohamed@unpredictable.fr>,
	Roman Bolshakov <rbolshakov@ddn.com>,
	 Phil Dennis-Jordan <phil@philjordan.eu>,
	Alexander Graf <agraf@csgraf.de>,
	qemu-arm@nongnu.org, qemu-devel@nongnu.org
Subject: Re: [PATCH v11.1+ v4] target/arm/hvf: Fix WFI halting to stop idle vCPU spinning
Date: Fri, 15 May 2026 11:39:24 +0100	[thread overview]
Message-ID: <CAFEAcA__VLg89_c3ZJMfN4BJs4sJ4KGFKnNVOW9AppoARRiMtw@mail.gmail.com> (raw)
In-Reply-To: <20260513022109.14107-1-scottjgo@gmail.com>

On Wed, 13 May 2026 at 03:21, Scott J. Goldman <scottjgo@gmail.com> wrote:
>
> Commit b5f8f77271 ("accel/hvf: Implement WFI without using pselect()")
> changed hvf_wfi() from blocking the vCPU thread with pselect() to
> returning EXCP_HLT, intending QEMU's main event loop to handle the
> idle wait. However, cpu->halted was never set, so cpu_thread_is_idle()
> always returns false and the vCPU thread spins at 100% CPU per core
> while the guest is idle.

I've applied this to target-arm.next for 11.1; thanks.

-- PMM


  reply	other threads:[~2026-05-15 10:39 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-10  4:47 [PATCH] target/arm/hvf: Fix WFI halting to stop idle vCPU spinning Scott J. Goldman
2026-04-10  5:06 ` Mohamed Mediouni
2026-04-10  5:28   ` Scott J. Goldman
2026-04-10  5:50 ` [PATCH v2] " Scott J. Goldman
2026-04-10  6:18   ` Mohamed Mediouni
2026-04-16 21:20     ` Scott J. Goldman
2026-04-17  9:57       ` Philippe Mathieu-Daudé
2026-04-17 20:30         ` Scott J. Goldman
2026-04-21 23:24           ` Scott J. Goldman
2026-04-27 11:15   ` Peter Maydell
2026-04-27 18:42     ` Scott J. Goldman
2026-04-27 19:55   ` [PATCH v3] " Scott J. Goldman
2026-05-12 16:46     ` Scott J. Goldman
2026-05-12 19:18       ` Peter Maydell
2026-05-12 17:54     ` Mohamed Mediouni
2026-05-12 20:36       ` Scott J. Goldman
2026-05-12 20:51         ` Mohamed Mediouni
2026-05-13  1:21     ` Mohamed Mediouni
2026-05-13  2:21       ` [PATCH v11.1+ v4] " Scott J. Goldman
2026-05-15 10:39         ` Peter Maydell [this message]
2026-05-13  2:25       ` [PATCH v3] " Scott J. Goldman
2026-05-13  7:14         ` Mohamed Mediouni

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