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[69.130.246.116]) by smtp.gmail.com with ESMTPSA id o17-20020a92c051000000b002fb78f6c166sm5225926ilf.10.2022.11.15.09.00.32 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Nov 2022 09:00:32 -0800 (PST) From: John Cabaj To: kernel-team@lists.ubuntu.com Subject: [SRU][bionic:linux-azure-4.15][PATCH 0/1] UBUNTU: SAUCE: Call trace during nvme storage performance test in bionic/linux-azure 4.15.0-1154 Date: Tue, 15 Nov 2022 11:00:30 -0600 Message-Id: <20221115170031.13179-1-john.cabaj@canonical.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" [Impact] Hypervisor only allocates interrupts to happen on a single physical GPU, which can lead to CPU soft locks when using PCI NVME under heavy load. [Test Case] Microsoft tested [Where things could go wrong] Hypervisor PCI driver may not load correctly. Patch did not apply cleanly and could lead to merge conflicts once the upstream patch is pulled in. [Other Info] SF: #00347669 John Cabaj (1): PCI: hv: Only reuse existing IRTE allocation for Multi-MSI drivers/pci/host/pci-hyperv.c | 68 +++++++++++++++++++++++++++-------- 1 file changed, 53 insertions(+), 15 deletions(-) Acked-by: Tim Gardner