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[176.103.220.4]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-438dcc6de7csm217995855e9.32.2025.02.03.22.48.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 22:48:58 -0800 (PST) Date: Tue, 4 Feb 2025 07:48:57 +0100 From: Stefano Brivio To: David Gibson Subject: Re: [PATCH v4 0/8] Draft, incomplete series introducing state migration Message-ID: <20250204074857.59674903@elisabeth> In-Reply-To: References: <20250204004745.97854-1-sbrivio@redhat.com> Organization: Red Hat X-Mailer: Claws Mail 4.2.0 (GTK 3.24.41; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: sIfpvNzi4X7BmXpRfiz2pRBa3LpZc5806mZLoUENoHs_1738651740 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Message-ID-Hash: Y3P737PB56XJS3UOPSFXQGMLJQJQ6PP2 X-Message-ID-Hash: Y3P737PB56XJS3UOPSFXQGMLJQJQ6PP2 X-MailFrom: sbrivio@redhat.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: passt-dev@passt.top, lvivier@redhat.com X-Mailman-Version: 3.3.8 Precedence: list List-Id: Development discussion and patches for passt Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: On Tue, 4 Feb 2025 17:01:04 +1100 David Gibson wrote: > With the hacky workaround, the connect() now success, but I still > couldn't send data from the target. From strace, the target side > passt doesn't seem to be attempting doing any writes to the socket, > but I'm not sure why yet. pcap on the target side does show some > packets on the stream coming from the guest, although it's only one > byte (0x0a) and I thought I'd typed 5ish. It then appears to > retransmit several times without getting an ack from passt. It looks like an issue with the window, I had something similar before it occurred to me that I had to set the window scaling. Perhaps my hardcoded value isn't good enough, after all. Can you share the pcap? -- Stefano