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b=v96/eeTBaGai3ppIbOqzBfcrsuOTwxN/QqLp67bV/2HTK37GAAANooOEuIUJcjJPs4LHMt sfWQou2ZUjsep0Cw== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 52C14779B6; Thu, 6 Aug 2026 08:29:11 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id Dk1gEddFdGoKbgAAD6G6ig (envelope-from ); Thu, 06 Aug 2026 08:29:11 +0000 Message-ID: <19ecac31-71d6-43f6-9453-52e6b1a04fcd@suse.de> Date: Thu, 6 Aug 2026 10:28:44 +0200 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] tcp: clarify comment for mdev_us in struct tcp_sock To: Ziran Zhang , Eric Dumazet , Neal Cardwell , Kuniyuki Iwashima Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260805131927.27661-1-zhangcoder@yeah.net> Content-Language: en-US From: Fernando Fernandez Mancera In-Reply-To: <20260805131927.27661-1-zhangcoder@yeah.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spamd-Result: default: False [-4.51 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; FREEMAIL_TO(0.00)[yeah.net,google.com]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[yeah.net]; MID_RHS_MATCH_FROM(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_FIVE(0.00)[6]; RCVD_TLS_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[yeah.net:email,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo,suse.de:email,suse.de:mid,suse.de:dkim]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.de:+] X-Spam-Flag: NO X-Spam-Score: -4.51 X-Spam-Level: X-Rspamd-Queue-Id: A73C33DF3 X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Action: no action On 8/5/26 3:19 PM, Ziran Zhang wrote: > The existing comment for mdev_us says "medium deviation", but this > term is inaccurate. The field stores the "mean deviation" of RTT, > as originally defined in Van Jacobson's paper "Congestion > Avoidance and Control", and it is scaled by 4 (<< 2) in the Linux > implementation. > > Update the comment to reflect the correct terminology and storage > format. > > Signed-off-by: Ziran Zhang Reviewed-by: Fernando Fernandez Mancera Thanks!