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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-kernel@vger.kernel.org Subject: Re: [PATCH net-next v3 2/2] net: dsa: yt921x: Protect MIB stats with a lock Date: Mon, 5 Jan 2026 10:51:39 +0800 Message-ID: <20260105025139.2348-1-dqfext@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260105020905.3522484-3-mmyangfl@gmail.com> References: <20260105020905.3522484-1-mmyangfl@gmail.com> <20260105020905.3522484-3-mmyangfl@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi David, On Mon, 5 Jan 2026 10:09:01 +0800, David Yang wrote: > 64bit variables might not be atomic on 32bit architectures, thus cannot > be made lock-free. Protect them with a spin lock since get_stats64() > cannot sleep. Synchronizing both reads and updates with a spin lock is an overkill. See include/linux/u64_stats_sync.h for a better approach. -- Qingfang