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[73.158.218.242]) by smtp.gmail.com with UTF8SMTPSA id d9443c01a7336-24c9669a0e1sm79220835ad.56.2025.09.05.15.55.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Sep 2025 15:55:29 -0700 (PDT) Date: Fri, 5 Sep 2025 15:55:28 -0700 From: Stanislav Fomichev To: Jakub Kicinski Cc: davem@davemloft.net, netdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com, andrew+netdev@lunn.ch, horms@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, sdf@fomichev.me, michael.chan@broadcom.com, anthony.l.nguyen@intel.com, marcin.s.wojtas@gmail.com, tariqt@nvidia.com, mbloch@nvidia.com, jasowang@redhat.com, bpf@vger.kernel.org, aleksander.lobakin@intel.com, pavan.chebbi@broadcom.com, przemyslaw.kitszel@intel.com Subject: Re: [PATCH net-next 0/2] net: xdp: handle frags with unreadable memory Message-ID: References: <20250905221539.2930285-1-kuba@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20250905221539.2930285-1-kuba@kernel.org> On 09/05, Jakub Kicinski wrote: > Make XDP helpers compatible with unreadable memory. This is very > similar to how we handle pfmemalloc frags today. Record the info > in xdp_buf flags as frags get added and then update the skb once > allocated. > > This series adds the unreadable memory metadata tracking to drivers > using xdp_build_skb_from*() with no changes on the driver side - hence > the only driver changes here are refactoring. Obviously, unreadable memory > is incompatible with XDP today, but thanks to xdp_build_skb_from_buf() > increasing number of drivers have a unified datapath, whether XDP is > enabled or not. > > RFC: https://lore.kernel.org/20250812161528.835855-1-kuba@kernel.org Acked-by: Stanislav Fomichev