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[78.154.15.182]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c250a5d62easm357931366b.6.2026.08.26.00.34.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 26 Aug 2026 00:34:12 -0700 (PDT) Message-ID: <3b77ed31-549e-4bb6-a7c6-b4f65dbdf784@blackwall.org> Date: Wed, 26 Aug 2026 10:34:11 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net v5 1/2] bonding: convert unbalanced_load to per-cpu state Content-Language: en-US, bg To: Hangbin Liu , Jay Vosburgh , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Hangbin Liu References: <20260825-bond_overflow-v5-0-7a800de133f1@kylinos.cn> <20260825-bond_overflow-v5-1-7a800de133f1@kylinos.cn> From: Nikolay Aleksandrov In-Reply-To: <20260825-bond_overflow-v5-1-7a800de133f1@kylinos.cn> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 25/08/2026 04:01, Hangbin Liu wrote: > From: Hangbin Liu > > A later patch widens the bonding TLB tx counters from u32 to u64. The > unbalanced_load counter sits in the transmit hot path, and cross-CPU > synchronization of a u64 would introduce measurable overhead. Convert > unbalanced_load to a per-cpu counter first so that the subsequent > widening only touches per-cpu data local to each CPU. > > Introduce struct unbalanced_load_stats to hold the per-cpu counter, > and move the aggregation into a helper, reset_unbalanced_load(), which > sums all per-cpu instances. Use the delta of current total load vs > variable prev_total_unbalanced to calculate the loading. > > Signed-off-by: Hangbin Liu > --- > drivers/net/bonding/bond_alb.c | 37 ++++++++++++++++++++++++++++++------- > include/net/bond_alb.h | 7 ++++++- > 2 files changed, 36 insertions(+), 8 deletions(-) > Reviewed-by: Nikolay Aleksandrov