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[175.34.8.244]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-87c32bba517sm277553b3a.40.2026.09.21.22.43.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 21 Sep 2026 22:43:30 -0700 (PDT) Message-ID: <46f77ab6-4f7a-4a40-b0e5-3ea92659d7a2@redhat.com> Date: Tue, 22 Sep 2026 15:43:26 +1000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 08/12] arm_mpam: resctrl: Correct check that existing class is L3 To: Ben Horgan Cc: james.morse@arm.com, reinette.chatre@intel.com, fenghuay@nvidia.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, dave.martin@arm.com, andre.przywara@arm.com References: <20260917145617.2202986-1-ben.horgan@arm.com> <20260917145617.2202986-9-ben.horgan@arm.com> From: Gavin Shan In-Reply-To: <20260917145617.2202986-9-ben.horgan@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: C3NjFr9Omo9EBgNv5c0NhijqIGZC-XV82X9VceCO62Y_1790055812 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260921_224335_842764_AA0E82DE X-CRM114-Status: GOOD ( 14.99 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 9/18/26 12:56 AM, Ben Horgan wrote: > The class used to back mbm_total_bytes can be either at the L3 or the > memory. If a platform had candidate classes at both the memory and the L3 > then, as the check for whether the existing class is L3 or not in > counter_update_class() is broken, the class that will be chosen depends on > which order the classes are considered and so the probe order. > > Fix the check. > > Fixes: 1458c4f05335 ("arm_mpam: resctrl: Add support for csu counters") > Tested-by: Gavin Shan > Signed-off-by: Ben Horgan > --- > drivers/resctrl/mpam_resctrl.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > Reviewed-by: Gavin Shan