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Sun, 9 May 2021 17:04:34 +0000 (UTC) Received: from [10.36.113.168] (ovpn-113-168.ams2.redhat.com [10.36.113.168]) by smtp.corp.redhat.com (Postfix) with ESMTPS id DAF1169FCE; Sun, 9 May 2021 17:04:24 +0000 (UTC) Subject: Re: [PATCH] Revert "irqbypass: do not start cons/prod when failed connect" To: Marc Zyngier , Zhu Lingshan Cc: jasowang@redhat.com, mst@redhat.com, alex.williamson@redhat.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, cohuck@redhat.com, stable@vger.kernel.org, Shaokun Zhang References: <20210508071152.722425-1-lingshan.zhu@intel.com> <8735uxvajh.wl-maz@kernel.org> From: Auger Eric Message-ID: <65e48458-f94c-e5fd-03d5-93d6acfb356c@redhat.com> Date: Sun, 9 May 2021 19:04:23 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 In-Reply-To: <8735uxvajh.wl-maz@kernel.org> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210509_100439_318667_75EC0595 X-CRM114-Status: GOOD ( 14.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On 5/8/21 11:29 AM, Marc Zyngier wrote: > On Sat, 08 May 2021 08:11:52 +0100, > Zhu Lingshan wrote: >> >> This reverts commit a979a6aa009f3c99689432e0cdb5402a4463fb88. >> >> The reverted commit may cause VM freeze on arm64 platform. >> Because on arm64 platform, stop a consumer will suspend the VM, >> the VM will freeze without a start consumer > > It also unconditionally calls del_consumer on the producer, which > isn't exactly expected. > >> >> Signed-off-by: Zhu Lingshan > > Reported-by: Shaokun Zhang Reviewed-by: Eric Auger Thanks Eric > Suggested-by: Marc Zyngier > Acked-by: Marc Zyngier > Fixes: a979a6aa009f ("irqbypass: do not start cons/prod when failed connect") > Link: https://lore.kernel.org/r/3a2c66d6-6ca0-8478-d24b-61e8e3241b20@hisilicon.com > Cc: stable@vger.kernel.org > > Thanks, > > M. > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel