From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp-fw-52003.amazon.com (smtp-fw-52003.amazon.com [52.119.213.152]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A2094EBE; Wed, 14 May 2025 20:54:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=52.119.213.152 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747256045; cv=none; b=B7QE41VsOYt6/UAa6VpsI5D9BcKX4ZVpDOYNUEmId3xWtEgqBkcwOQW6cjA2K41nj3G0TVtQbxXoGxWvAOYNnkft3hp+mbRjYYTQ0fyYxvSdmOXiPQzlzES8PVXaCOi02Zgbqpgic/4ryo9q79My1KiB5SYEoHuXaS2BHQLmWlM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747256045; c=relaxed/simple; bh=OgvTAnToodXrbkk+luxVq7qzf+SV6riaQuSHxXFXsyY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=elgTOP4cWrYaAh+mztNIUz7lYFavgyBlP/wU9jKoV2kClhwbNc78bmTQCZmlyhPemfHnsjucKlhRaKk+FjjkKYp/FDU5KpUmm7Aio1M5mHm1A7vSHZEKsnpvXzUKqexRyY/hjLIwm8j5XbghqqRmYWMjox+NT9SC/LUgz9lBnWE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com; spf=pass smtp.mailfrom=amazon.co.jp; dkim=pass (2048-bit key) header.d=amazon.com header.i=@amazon.com header.b=Ton4bTVz; arc=none smtp.client-ip=52.119.213.152 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.co.jp Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=amazon.com header.i=@amazon.com header.b="Ton4bTVz" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazoncorp2; t=1747256044; x=1778792044; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Lpjnct4m/uQSVmHA+Sg9hZodDW5ZslWSP4blJlaPXCs=; b=Ton4bTVzQ/ikUJCWQuRjKkT3uzwfsBAK2cYdXi8KPzP+6FWypHNlp+Pn sU1OxWcC4CKkAaRDExdaX/vt21k7zTYRbI7HpCKihR2ru2Yj4KQEXQuDN aXgZ+ISjNcJCqcp/hCWjV2WGfRX929tXATW8VmolNkQv+hcH4YDq2IFvc yekKFe959nrhhd2ooA76WZPG1zNOxXhmTOLVCuTM/JO9sDmbxn6IR4lAS 3XifDEQhC6s/djGeJ07g6+zOtj7w9RQPsxmhlC5V+bnvpZzO5+ocaHBGe XoXatT7SXTVWUXMkSOKBiXTg+thUnLrz9/4+gp7ucX11SY2mT6KCfS/to A==; X-IronPort-AV: E=Sophos;i="6.15,289,1739836800"; d="scan'208";a="93291435" Received: from iad12-co-svc-p1-lb1-vlan3.amazon.com (HELO smtpout.prod.us-west-2.prod.farcaster.email.amazon.dev) ([10.43.8.6]) by smtp-border-fw-52003.iad7.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 May 2025 20:54:00 +0000 Received: from EX19MTAUWB001.ant.amazon.com [10.0.7.35:5803] by smtpin.naws.us-west-2.prod.farcaster.email.amazon.dev [10.0.61.52:2525] with esmtp (Farcaster) id 48c7ad1c-9ae7-448f-879b-f66afc2dbc9c; Wed, 14 May 2025 20:53:59 +0000 (UTC) X-Farcaster-Flow-ID: 48c7ad1c-9ae7-448f-879b-f66afc2dbc9c Received: from EX19D004ANA001.ant.amazon.com (10.37.240.138) by EX19MTAUWB001.ant.amazon.com (10.250.64.248) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1544.14; Wed, 14 May 2025 20:53:59 +0000 Received: from 6c7e67bfbae3.amazon.com (10.187.171.38) by EX19D004ANA001.ant.amazon.com (10.37.240.138) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1544.14; Wed, 14 May 2025 20:53:56 +0000 From: Kuniyuki Iwashima To: CC: , , , , , , , , , , Subject: Re: [PATCH net-next 11/11] tcp: increase tcp_rmem[2] to 32 MB Date: Wed, 14 May 2025 13:53:39 -0700 Message-ID: <20250514205348.78733-1-kuniyu@amazon.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250514132422.2eefdbf1@kernel.org> References: <20250514132422.2eefdbf1@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: EX19D042UWB002.ant.amazon.com (10.13.139.175) To EX19D004ANA001.ant.amazon.com (10.37.240.138) From: Jakub Kicinski Date: Wed, 14 May 2025 13:24:22 -0700 > On Tue, 13 May 2025 19:39:19 +0000 Eric Dumazet wrote: > > Last change to tcp_rmem[2] happened in 2012, in commit b49960a05e32 > > ("tcp: change tcp_adv_win_scale and tcp_rmem[2]") > > > > TCP performance on WAN is mostly limited by tcp_rmem[2] for receivers. > > > > After this series improvements, it is time to increase the default. > > I think this breaks the BPF syncookie test, Kuniyuki any idea why? > > https://github.com/kernel-patches/bpf/actions/runs/15016644781/job/42196471693 It seems ACK was not handled by BPF at tc hook on lo. ACK was not sent or tcp_load_headers() failed to parse it ? both sounds unlikely though. Will try to reproduce it.