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=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 84392C3A5A5 for ; Tue, 3 Sep 2019 06:00:10 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5547021897 for ; Tue, 3 Sep 2019 06:00:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="aOju+X4N"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="W+I4BGQS" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5547021897 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3HNh7ILxXbnPwbJCXstEKUejqCWY/VdGa3Vv8unC+XQ=; b=aOju+X4N0ABxr4 Va3IsK/wqc3npvDeRSj0Fl+/gAEJ+OOzwwDpQPf8gjYaFdNzC3nd8MJB6GYrr5tlFYkbYLKfKjH5v 6pHcAN+LX1GTZTkwWB6qiGpiWSdCK/AydTTKdGVbpi/fCMxki3JA0P4G2fLyvw2PflNisVu24JToh qMt52RJhwVDkiXSLLrdVcyu+Ao7z4J7ptTyQ5U0YTn0uYKFVcUnfDfKSZwwQMsxTYtAyunXarV9ks +07wbIDiKetRCQVOfi1NUUZLboxaEEMRWaRSbfAl50jvYToSWvOlxI37XV0G5PNC8r5tw9mwtJsix bST++bpl094M9Zgz+EmA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i51r9-0001J8-19; Tue, 03 Sep 2019 05:59:55 +0000 Received: from mail-wm1-x343.google.com ([2a00:1450:4864:20::343]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i51qy-0001Ho-QB for linux-nvme@lists.infradead.org; Tue, 03 Sep 2019 05:59:52 +0000 Received: by mail-wm1-x343.google.com with SMTP id n10so5951919wmj.0 for ; Mon, 02 Sep 2019 22:59:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:openpgp:autocrypt:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=5OaqEB+Ql5gF4IT+t4x18K2e31MSKyU+TcrDfGB2XmY=; b=W+I4BGQSPl5zJd8nLqAWtZJFxym6GP+U5i95DBK9RFxuUZor9clqPGN7K7jQInRkTJ DvVypeAsNtK+irkB82NXHTgGFIumu90tJxX5PRSpiGCELE0Aj5y3Bdm6rPdwEBc9mOHl sDWbZ029VAoUgBLZlOBBeGzPBY1zfq7h5YYb6r23OKmD+uMOsAhnHVTsUZ0gF9DqKcYm tE1ImxXxtwRfVZ12Ts+p8KzIyGDA02yxwAXgDzALBcLbc5JKFSFJyMhnEmgZZ/ygdlK0 P1OqnG5e5UwmtXaZiWSLsrRQKaqJT8kcFR9AL6W7cadXKYqK9i8LUnIYSPdEmSO7D7EL Spiw== 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:openpgp:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=5OaqEB+Ql5gF4IT+t4x18K2e31MSKyU+TcrDfGB2XmY=; b=I2gzWp51wjJzGYb+u2LLAbT2s9G1dzlWyxqhObB6aUNqUi3a+vUbb4/7cvTi0e1bYW Eeg2H48d7MUaCWGp+g6ZGa/wGYkk6Z0CMgjhUd5XDsyPO8JLYLfgph0ldWrzHDaA52BK ZXkNcATZngCSYIgVh+cd1T2hyMrTl3ZCzEVSg9cJ3xlHki1Ho0685Rz/v9ngX4finmeB 7aKiD0DxolZ3twABjwDpgacuuCXzgcSEPXg8yX5YStx4AHQmQln7YNtyCgML+gc8L8qg E0jIanZHgrbsID5GDGJG4nT8V7bwbG7ukUGcTKRogz5ku8tD39iqI1axta845mHX6jpS BIBA== X-Gm-Message-State: APjAAAWRtfOQDcfCJhzajinHjdKKHAs7UqOvkQESvPXP9VM4qnaLmznA rssXikFQvNmxD7lMp8iZow9qAg== X-Google-Smtp-Source: APXvYqzmHtMSLrXJLm19YRdAq9C1sPS1+c7xFg7DkLhF67LJAujDKvYA1mBgb6+2sA3zkSeZABOulg== X-Received: by 2002:a1c:a90b:: with SMTP id s11mr18413215wme.92.1567490382139; Mon, 02 Sep 2019 22:59:42 -0700 (PDT) Received: from ?IPv6:2a01:e34:ed2f:f020:ca2:9689:fa5d:1fea? ([2a01:e34:ed2f:f020:ca2:9689:fa5d:1fea]) by smtp.googlemail.com with ESMTPSA id f143sm8745177wme.40.2019.09.02.22.59.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 02 Sep 2019 22:59:40 -0700 (PDT) Subject: Re: [PATCH 1/4] softirq: implement IRQ flood detection mechanism To: Ming Lei , Thomas Gleixner References: <20190827085344.30799-1-ming.lei@redhat.com> <20190827085344.30799-2-ming.lei@redhat.com> <20190827225827.GA5263@ming.t460p> <20190828110633.GC15524@ming.t460p> <20190828135054.GA23861@ming.t460p> <20190903033001.GB23861@ming.t460p> From: Daniel Lezcano Openpgp: preference=signencrypt Autocrypt: addr=daniel.lezcano@linaro.org; prefer-encrypt=mutual; keydata= mQINBFv/yykBEADDdW8RZu7iZILSf3zxq5y8YdaeyZjI/MaqgnvG/c3WjFaunoTMspeusiFE sXvtg3ehTOoyD0oFjKkHaia1Zpa1m/gnNdT/WvTveLfGA1gH+yGes2Sr53Ht8hWYZFYMZc8V 2pbSKh8wepq4g8r5YI1XUy9YbcTdj5mVrTklyGWA49NOeJz2QbfytMT3DJmk40LqwK6CCSU0 9Ed8n0a+vevmQoRZJEd3Y1qXn2XHys0F6OHCC+VLENqNNZXdZE9E+b3FFW0lk49oLTzLRNIq 0wHeR1H54RffhLQAor2+4kSSu8mW5qB0n5Eb/zXJZZ/bRiXmT8kNg85UdYhvf03ZAsp3qxcr xMfMsC7m3+ADOtW90rNNLZnRvjhsYNrGIKH8Ub0UKXFXibHbafSuq7RqyRQzt01Ud8CAtq+w P9EftUysLtovGpLSpGDO5zQ++4ZGVygdYFr318aGDqCljKAKZ9hYgRimPBToDedho1S1uE6F 6YiBFnI3ry9+/KUnEP6L8Sfezwy7fp2JUNkUr41QF76nz43tl7oersrLxHzj2dYfWUAZWXva wW4IKF5sOPFMMgxoOJovSWqwh1b7hqI+nDlD3mmVMd20VyE9W7AgTIsvDxWUnMPvww5iExlY eIC0Wj9K4UqSYBOHcUPrVOKTcsBVPQA6SAMJlt82/v5l4J0pSQARAQABtCpEYW5pZWwgTGV6 Y2FubyA8ZGFuaWVsLmxlemNhbm9AbGluYXJvLm9yZz6JAlcEEwEIAEECGwEFCwkIBwIGFQoJ CAsCBBYCAwECHgECF4ACGQEWIQQk1ibyU76eh+bOW/SP9LjScWdVJwUCXAkeagUJDRnjhwAK CRCP9LjScWdVJ+vYEACStDg7is2JdE7xz1PFu7jnrlOzoITfw05BurgJMqlvoiFYt9tEeUMl zdU2+r0cevsmepqSUVuUvXztN8HA/Ep2vccmWnCXzlE56X1AK7PRRdaQd1SK/eVsJVaKbQTr ii0wjbs6AU1uo0LdLINLjwwItnQ83/ttbf1LheyN8yknlch7jn6H6J2A/ORZECTfJbG4ecVr 7AEm4A/G5nyPO4BG7dMKtjQ+crl/pSSuxV+JTDuoEWUO+YOClg6azjv8Onm0cQ46x9JRtahw YmXdIXD6NsJHmMG9bKmVI0I7o5Q4XL52X6QxkeMi8+VhvqXXIkIZeizZe5XLTYUvFHLdexzX Xze0LwLpmMObFLifjziJQsLP2lWwOfg6ZiH8z8eQJFB8bYTSMqmfTulB61YO0mhd676q17Y7 Z7u3md3CLH7rh61wU1g7FcLm9p5tXXWWaAud9Aa2kne2O3sirO0+JhsKbItz3d9yXuWgv6w3 heOIF0b91JyrY6tjz42hvyjxtHywRr4cdAEQa2S7HeQkw48BQOG6PqQ9d3FYU34pt3WFJ19V A5qqAiEjqc4N0uPkC79W32yLGdyg0EEe8v0Uhs3CxM9euGg37kr5fujMm+akMtR1ENITo+UI fgsxdwjBD5lNb/UGodU4QvPipB/xx4zz7pS5+2jGimfLeoe7mgGJxrkBDQRb/8z6AQgAvSkg 5w7dVCSbpP6nXc+i8OBz59aq8kuL3YpxT9RXE/y45IFUVuSc2kuUj683rEEgyD7XCf4QKzOw +XgnJcKFQiACpYAowhF/XNkMPQFspPNM1ChnIL5KWJdTp0DhW+WBeCnyCQ2pzeCzQlS/qfs3 dMLzzm9qCDrrDh/aEegMMZFO+reIgPZnInAcbHj3xUhz8p2dkExRMTnLry8XXkiMu9WpchHy XXWYxXbMnHkSRuT00lUfZAkYpMP7La2UudC/Uw9WqGuAQzTqhvE1kSQe0e11Uc+PqceLRHA2 bq/wz0cGriUrcCrnkzRmzYLoGXQHqRuZazMZn2/pSIMZdDxLbwARAQABiQI2BBgBCAAgFiEE JNYm8lO+nofmzlv0j/S40nFnVScFAlv/zPoCGwwACgkQj/S40nFnVSf4OhAAhWJPjgUu6VfS mV53AUGIyqpOynPvSaMoGJzhNsDeNUDfV5dEZN8K4qjuz2CTNvGIyt4DE/IJbtasvi5dW4wW Fl85bF6xeLM0qpCaZtXAsU5gzp3uT7ut++nTPYW+CpfYIlIpyOIzVAmw7rZbfgsId2Lj7g1w QCjvGHw19mq85/wiEiZZNHeJQ3GuAr/uMoiaRBnf6wVcdpUTFMXlkE8/tYHPWbW0YKcKFwJ3 uIsNxZUe6coNzYnL0d9GK2fkDoqKfKbFjNhW9TygfeL2Qhk949jMGQudFS3zlwvN9wwVaC0i KC/D303DiTnB0WFPT8CltMAZSbQ1WEWfwqxhY26di3k9pj+X3BfOmDL9GBlnRTSgwjqjqzpG VZsWouuTfXd9ZPPzvYdUBrlTKgojk1C8v4fhSqb+ard+bZcwNp8Tzl/EI9ygw6lYEATGCUYI Wco+fjehCgG1FWvWavMU+jLNs8/8uwj1u+BtRpWFj4ug/VaDDIuiApKPwl1Ge+zoC7TLMtyb c00W5/8EckjmNgLDIINEsOsidMH61ZOlwDKCxo2lbV+Ij078KHBIY76zuHlwonEQaHLCAdqm WiI95pYZNruAJEqZCpvXDdClmBVMZRDRePzSljCvoHxn7ArEt3F14mabn2RRq/hqB8IhC6ny xAEPQIZaxxginIFYEziOjR65AQ0EW//NCAEIALcJqSmQdkt04vIBD12dryF6WcVWYvVwhspt RlZbZ/NZ6nzarzEYPFcXaYOZCOCv+Xtm6hB8fh5XHd7Y8CWuZNDVp3ozuqwTkzQuux/aVdNb Fe4VNeKGN2FK1aNlguAXJNCDNRCpWgRHuU3rWwGUMgentJogARvxfex2/RV/5mzYG/N1DJKt F7g1zEcQD3JtK6WOwZXd+NDyke3tdG7vsNRFjMDkV4046bOOh1BKbWYu8nL3UtWBxhWKx3Pu 1VOBUVwL2MJKW6umk+WqUNgYc2bjelgcTSdz4A6ZhJxstUO4IUfjvYRjoqle+dQcx1u+mmCn 8EdKJlbAoR4NUFZy7WUAEQEAAYkDbAQYAQgAIBYhBCTWJvJTvp6H5s5b9I/0uNJxZ1UnBQJb /80IAhsCAUAJEI/0uNJxZ1UnwHQgBBkBCAAdFiEEGn3N4YVz0WNVyHskqDIjiipP6E8FAlv/ zQgACgkQqDIjiipP6E+FuggAl6lkO7BhTkrRbFhrcjCm0bEoYWnCkQtX9YFvElQeA7MhxznO BY/r1q2Uf6Ifr3YGEkLnME/tQQzUwznydM94CtRJ8KDSa1CxOseEsKq6B38xJtjgYSxNdgQb EIfCzUHIGfk94AFKPdV6pqqSU5VpPUagF+JxiAkoEPOdFiQCULFNRLMsOtG7yp8uSyJRp6Tz cQ+0+1QyX1krcHBUlNlvfdmL9DM+umPtbS9F6oRph15mvKVYiPObI1z8ymHoc68ReWjhUuHc IDQs4w9rJVAyLypQ0p+ySDcTc+AmPP6PGUayIHYX63Q0KhJFgpr1wH0pHKpC78DPtX1a7HGM 7MqzQ4NbD/4oLKKwByrIp12wLpSe3gDQPxLpfGgsJs6BBuAGVdkrdfIx2e6ENnwDoF0Veeji BGrVmjVgLUWV9nUP92zpyByzd8HkRSPNZNlisU4gnz1tKhQl+j6G/l2lDYsqKeRG55TXbu9M LqJYccPJ85B0PXcy63fL9U5DTysmxKQ5RgaxcxIZCM528ULFQs3dfEx5euWTWnnh7pN30RLg a+0AjSGd886Bh0kT1Dznrite0dzYlTHlacbITZG84yRk/gS7DkYQdjL8zgFr/pxH5CbYJDk0 tYUhisTESeesbvWSPO5uNqqy1dAFw+dqRcF5gXIh3NKX0gqiAA87NM7nL5ym/CNpJ7z7nRC8 qePOXubgouxumi5RQs1+crBmCDa/AyJHKdG2mqCt9fx5EPbDpw6Zzx7hgURh4ikHoS7/tLjK iqWjuat8/HWc01yEd8rtkGuUcMqbCi1XhcAmkaOnX8FYscMRoyyMrWClRZEQRokqZIj79+PR adkDXtr4MeL8BaB7Ij2oyRVjXUwhFQNKi5Z5Rve0a3zvGkkqw8Mz20BOksjSWjAF6g9byukl CUVjC03PdMSufNLK06x5hPc/c4tFR4J9cLrV+XxdCX7r0zGos9SzTPGNuIk1LK++S3EJhLFj 4eoWtNhMWc1uiTf9ENza0ntqH9XBWEQ6IA1gubCniGG+Xg== Message-ID: <299fb6b5-d414-2e71-1dd2-9d6e34ee1c79@linaro.org> Date: Tue, 3 Sep 2019 07:59:39 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190903033001.GB23861@ming.t460p> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190902_225945_531485_DB23277A X-CRM114-Status: GOOD ( 16.11 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jens Axboe , Hannes Reinecke , Sagi Grimberg , linux-scsi@vger.kernel.org, Peter Zijlstra , Long Li , John Garry , LKML , linux-nvme@lists.infradead.org, Keith Busch , Ingo Molnar , Christoph Hellwig Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org CkhpIE1pbmcgTGVpLAoKT24gMDMvMDkvMjAxOSAwNTozMCwgTWluZyBMZWkgd3JvdGU6CgpbIC4u LiBdCgoKPj4+IDIpIGlycS90aW1pbmcgZG9lc24ndCBjb3ZlciBzb2Z0aXJxCj4+Cj4+IFRoYXQn cyBzb2x2YWJsZSwgcmlnaHQ/Cj4gCj4gWWVhaCwgd2UgY2FuIGV4dGVuZCBpcnEvdGltaW5nLCBi dXQgdWdseSBmb3IgaXJxL3RpbWluZywgc2luY2UgaXJxL3RpbWluZwo+IGZvY3VzZXMgb24gaGFy ZGlycSBwcmVkaWNhdGlvbiwgYW5kIHNvZnRpcnEgaXNuJ3QgaW52b2x2ZWQgaW4gdGhhdAo+IHB1 cnBvc2UuCj4gCj4+ICAKPj4+IERhbmllbCwgY291bGQgeW91IHRha2UgYSBsb29rIGFuZCBzZWUg aWYgaXJxIGZsb29kIGRldGVjdGlvbiBjYW4gYmUKPj4+IGltcGxlbWVudGVkIGVhc2lseSBieSBp cnEvdGltaW5nLmM/Cj4+Cj4+IEkgYXNzdW1lIHlvdSBjYW4gdGFrZSBhIGxvb2sgYXMgd2VsbCwg cmlnaHQ/Cj4gCj4gWWVhaCwgSSBoYXZlIGxvb2tlZCBhdCB0aGUgY29kZSBmb3IgYSB3aGlsZSwg YnV0IEkgdGhpbmsgdGhhdCBpcnEvdGltaW5nCj4gY291bGQgYmVjb21lIGNvbXBsaWNhdGVkIHVu bmVjZXNzYXJpbHkgZm9yIGNvdmVyaW5nIGlycSBmbG9vZCBkZXRlY3Rpb24sCj4gbWVhbnRpbWUg aXQgaXMgbXVjaCBsZXNzIGVmZmljaWVudCBmb3IgZGV0ZWN0aW5nIElSUSBmbG9vZC4KCkluIHRo ZSBzZXJpZXMsIHRoZXJlIGlzIG5vdGhpbmcgZGVzY3JpYmluZyByaWdvcm91c2x5IHRoZSBwcm9i bGVtIChJIGNhbgpvbmx5IGd1ZXNzKSBhbmQgd2h5IHRoZSBwcm9wb3NlZCBzb2x1dGlvbiBzb2x2 ZXMgaXQuCgpXaGF0IGlzIHlvdXIgZGVmaW5pdGlvbiBvZiBhbiAnaXJxIGZsb29kJz8gQSBoaWdo IGlycSBsb2FkPyBBbiBpcnEKYXJyaXZpbmcgd2hpbGUgd2UgYXJlIHByb2Nlc3NpbmcgdGhlIHBy ZXZpb3VzIG9uZSBpbiB0aGUgYm90dG9tIGhhbHZlcz8KClRoZSBwYXRjaCAyLzQgZGVzY3JpcHRp b24gc2F5cyAiaG93ZXZlciBJTyBjb21wbGV0aW9uIGlzIG9ubHkgZG9uZSBvbgpvbmUgb2YgdGhl c2Ugc3VibWlzc2lvbiBDUFUgY29yZXMiLiBUaGF0IGRlc2NyaWJlcyB0aGUgYm90dGxlbmVjayBh bmQKdGhlbiB0aGUgcGF0Y2ggc2F5cyAiQWRkIElSUUZfUkVTQ1VFX1RIUkVBRCB0byBjcmVhdGUg b25lIGludGVycnVwdAp0aHJlYWQgaGFuZGxlciIsIHdoYXQgaXMgdGhlIHJhdGlvbmFsIGJldHdl ZW4gdGhlIGJvdHRsZW5lY2sgKHByb2JsZW0pCmFuZCB0aGUgaXJxZl9yZXNjdWVfdGhyZWFkIChz b2x1dGlvbik/CgpJcyBpdCByZWFsbHkgdGhlIHNvbHV0aW9uIHRvIHRyYWNrIHRoZSBpcnEgdGlt aW5ncyB0byBkZXRlY3QgYSBmbG9vZD8KCgoKLS0gCiA8aHR0cDovL3d3dy5saW5hcm8ub3JnLz4g TGluYXJvLm9yZyDilIIgT3BlbiBzb3VyY2Ugc29mdHdhcmUgZm9yIEFSTSBTb0NzCgpGb2xsb3cg TGluYXJvOiAgPGh0dHA6Ly93d3cuZmFjZWJvb2suY29tL3BhZ2VzL0xpbmFybz4gRmFjZWJvb2sg fAo8aHR0cDovL3R3aXR0ZXIuY29tLyMhL2xpbmFyb29yZz4gVHdpdHRlciB8CjxodHRwOi8vd3d3 LmxpbmFyby5vcmcvbGluYXJvLWJsb2cvPiBCbG9nCgoKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KTGludXgtbnZtZSBtYWlsaW5nIGxpc3QKTGludXgtbnZt ZUBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4v bGlzdGluZm8vbGludXgtbnZtZQo=