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[78.154.14.127]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a039505568sm92985945e9.3.2026.10.02.12.59.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 02 Oct 2026 12:59:58 -0700 (PDT) Message-ID: <29eac8d5-4b2a-4f34-8792-76eecaefa184@blackwall.org> Date: Fri, 2 Oct 2026 22:59:57 +0300 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next 08/12] net: bridge: vlan: quiesce readers before freeing port VLANs Content-Language: en-US, bg To: Jakub Kicinski Cc: netdev-bot+sashiko@kernel.org, netdev@vger.kernel.org, idosch@nvidia.com, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, horms@kernel.org, bridge@lists.linux.dev References: <20260930071411.2786201-9-razor@blackwall.org> <179085595119.434549.4421493167752460988@kernel.org> <20261002125005.15b6b56e@kernel.org> From: Nikolay Aleksandrov In-Reply-To: <20261002125005.15b6b56e@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 02/10/2026 22:50, Jakub Kicinski wrote: > On Thu, 1 Oct 2026 15:07:21 +0300 Nikolay Aleksandrov wrote: >> - Yes, they can be batched and I had them batched initially but when >> I ran my tests I didn't notice any problems deleting a full VLAN >> range. It took 79ms on my host to delete 4k VLANs. As I've stated in >> my cover letter - the complexity is not worth it, so I dropped that >> patch. > > For the 79ms number - how big was the system and was it busy? It was a VM with 3 vCPUs, not load. The baseline (without patches) was ~25% faster. This is still a slow path and deleting 4k VLANs is not a common thing. :) Note that flushing all VLANs usually happens when a port is being deleted and that is still fast as before (it doesn't wait a gp for every VLAN).