From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F0DE54437C; Wed, 17 Jul 2024 09:21:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721208093; cv=none; b=Ggx403jBkWHqM3t7WA74MYPZWSnUN5MgW3GzbcZnTTlqHYi/mNm8WwJ31CDbp2DKApnTdVDrkKu39/mutxGE0RMBcvsdmxb0XZz57DcB9rdnMVGKfdySgIaSvP4N04v0JT85D7moyFO80X8AK5JzyWSr1u5q5+GDlLMjxq90+V4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721208093; c=relaxed/simple; bh=p/14NgBTEAYOXETrq6QR4JyC+13t5geb+OWGpfi6kos=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=kxARQIIpcYiAD6Y5/2MlpgADCN/7WZ+bQSOYntFT+gqIc1qRegmsj0YnE16Ns9RCM19kX4k8MWiE1NV4yfGHsyFsOlKqgZElBVkLqW2t/xp4ijtIh39hEZ8NzaeeuvNtobUdd5VFdHx3b7h33yVasTiQGsRAd5wJ5vGS4F2Obaw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YNHP085R; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YNHP085R" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6687AC32782; Wed, 17 Jul 2024 09:21:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1721208092; bh=p/14NgBTEAYOXETrq6QR4JyC+13t5geb+OWGpfi6kos=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=YNHP085RQ1+8gJ/IWDLH7lPABlFl8G/hek5vHVJAKCdEPoVQk629c8i8TRDimaAVK B0Ef06/+RyZ9zeORL/MG3jCEA+PDxm9XqBfJaA6u4RKH0JjX3423215TgnvvpRGSV3 xvZzuavsC3YBoBRLGFx6MTRJ/3D0sB9YqGu6zOSbZnaHfRLOdW1eW6l+dwNMMu2kGg fr3aYaXeyZw2cgGdDdN7+8tRC9HaOCRwAQXD6vX57oSSzUOxi0+FjYpxXgsRmiiTOZ e8Bdv0Cy6JMGvCVcdq/nzZma1sUOJOIsbrGJ9BcGP6lApvb8uWJY8AL1nsU63z0jlB S3ry17/YsqO+A== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1sU0qo-00D5oD-0g; Wed, 17 Jul 2024 10:21:30 +0100 Date: Wed, 17 Jul 2024 10:21:29 +0100 Message-ID: <86o76w2x2e.wl-maz@kernel.org> From: Marc Zyngier To: Tangnianyao Cc: , , , Thomas Gleixner , "guoyang (C)" , jiangkunkun , wangwudi Subject: Re: [PATCH 0/3] irqchip/gic-v4: Fix VMAPP/VMOVP races In-Reply-To: <42e08881-5faf-a78c-0d94-2a48415bc655@huawei.com> References: <20240705093155.871070-1-maz@kernel.org> <42e08881-5faf-a78c-0d94-2a48415bc655@huawei.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.3 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: tangnianyao@huawei.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, guoyang2@huawei.com, jiangkunkun@huawei.com, wangwudi@hisilicon.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Wed, 17 Jul 2024 09:41:30 +0100, Tangnianyao wrote: > > Hi, Marc > > I meet another problem while fixing this in kernel 5.10. > > Kernel 5.10 does not support guard and we replace it with raw_spin_lock/unlock. > When guest insmod nic drivers, it trigger host cpu power off somehow. The same > testcase runs quite good in kernel 6.6(both host and guest). This suggests that you got the locking order wrong, that one or several CPUs deadlock, and that a watchdog fires. > Would you fix this on long-term kernel 5.10? Or any sugguestion? Sorry, but I have no intention to maintain such an ancient kernel, which is why I did not Cc stable on these patches. I have no bandwidth for this, nor any interest in it. M. -- Without deviation from the norm, progress is not possible.