From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B31DC433E0 for ; Mon, 1 Feb 2021 18:41:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E69F064E9A for ; Mon, 1 Feb 2021 18:41:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233051AbhBASku (ORCPT ); Mon, 1 Feb 2021 13:40:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54340 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233090AbhBASjQ (ORCPT ); Mon, 1 Feb 2021 13:39:16 -0500 Received: from mail-io1-xd34.google.com (mail-io1-xd34.google.com [IPv6:2607:f8b0:4864:20::d34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4DCCC061786 for ; Mon, 1 Feb 2021 10:38:20 -0800 (PST) Received: by mail-io1-xd34.google.com with SMTP id n14so4654526iog.3 for ; Mon, 01 Feb 2021 10:38:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=vR0B9VlMvNtAZhaGiDDVhMV/Qg/talwAAAGPTlNsNtk=; b=ClQyNUKzXM47JsEx0o5ozMu+l0YAQEH4Cul5XFHJbMBLm64Z5h9Ivl0gkQigST+UzP DA7uHTnknG+BPG4YRRJp4V36JvOJ+zyx6K2Qg+AGDf2iClTPYYQdQvgE2siKg3SuGqc4 tJZ6gri3JHv7onV/u46t0pd+rGwlHNS7eyUhAMNoD53/cTlSO2blo1a8/GkaMwYgJaNu LUu5eEI9eQ++TDpcy2arFsWzxxXYBF7sPFFh4GhDT0TN7jT725maFb3AufQquEtbFLOk uVztoPtN0phKAr0VoUXUSar2ad3eoC8KSiNG4Q/ap37/DqjqxTZx+MgowNsj6XvZeGHD EXAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=vR0B9VlMvNtAZhaGiDDVhMV/Qg/talwAAAGPTlNsNtk=; b=iXszlopBNymPO8tEFx7s2F9m1ceTFfmmpKHMP7f4xHs9b3URL9fBTOH8DNVjw63woe rD6C3bvjSRBOPuK69ARA1xt4Uf00k5v/YMKXPDneVCz7MurLRn2G+TgF/6j9L2wxpsJ/ g/m6BXIJeHbPY5vErKYfF0ugiJQMjqUqstbJ/abOCVRfrL3IfPO8VegPB50SfZgdibFw 0RCbLX//DO20CMvNVDBQs5qAK24oEDb0cTaRrBiLNHRiKXgBQ/3wgXO66DtJuvO4br4T S4doJWKXa/BtkbPfPxfQjAMaPaua843K3dn4/NZkdwdKrffYGme5R6baKV05CraUi+pI dwig== X-Gm-Message-State: AOAM532dECwamV3sKo2QiRQV1wGQNaCtxCVppZzWjfk2jdV81m8EcXYd Lzgb86ou5HN3iGBHl3rb0iHq/XoxTZPnLA== X-Google-Smtp-Source: ABdhPJwntFOgORy4jVi4QQK3FXqa3bciAQsugPOFGhLws6tZemaqRuZEXu7iDm3Bv0EH5BdUpL3PZg== X-Received: by 2002:a05:6602:2c4e:: with SMTP id x14mr13314766iov.58.1612204700152; Mon, 01 Feb 2021 10:38:20 -0800 (PST) Received: from [172.22.22.4] (c-73-185-129-58.hsd1.mn.comcast.net. [73.185.129.58]) by smtp.googlemail.com with ESMTPSA id o131sm1751789ila.5.2021.02.01.10.38.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 01 Feb 2021 10:38:19 -0800 (PST) Subject: Re: [PATCH net-next 9/9] net: ipa: don't disable NAPI in suspend To: Willem de Bruijn Cc: David Miller , Jakub Kicinski , elder@kernel.org, evgreen@chromium.org, bjorn.andersson@linaro.org, cpratapa@codeaurora.org, Subash Abhinov Kasiviswanathan , Network Development , LKML References: <20210129202019.2099259-1-elder@linaro.org> <20210129202019.2099259-10-elder@linaro.org> <67f4aa5a-4a60-41e6-a049-0ff93fb87b66@linaro.org> From: Alex Elder Message-ID: <1aa6778a-6aff-e72f-ca98-74ce952c1e56@linaro.org> Date: Mon, 1 Feb 2021 12:38:18 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/1/21 8:47 AM, Willem de Bruijn wrote: >> - I will begin some long testing later today without >> this last patch applied >> --> But I think testing without the IRQ ordering >> patch would be more promising, and I'd like >> to hear your opinion on that > Either test depends on whether you find it worthwhile to more > specifically identify the root cause. If not, no need to run the tests > on my behalf. I understand that these are time consuming. I *would* like to really understand the root cause. And a month ago I would have absolutely gone through a bisect process so I could narrow it down. But at this point I'm content to have it fixed (fingers crossed) and am more interested in putting all this behind me. It's taken a lot of time and attention. And even though this represents a real bug, at least for now I am content to keep all this work in net-next rather than isolate the specific problem and try to back-port it (without all the other 20+ commits that preceded these) to the net branch. So although I see the value in identifying the specific root cause, I'm not going to do that unless/until it becomes clear it *must* be done (to back-port to net). -Alex