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=-1.0 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 1D67EC43387 for ; Sat, 5 Jan 2019 21:21:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E9426213A2 for ; Sat, 5 Jan 2019 21:21:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726388AbfAEVV2 (ORCPT ); Sat, 5 Jan 2019 16:21:28 -0500 Received: from mout.gmx.net ([212.227.17.20]:33851 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726330AbfAEVV2 (ORCPT ); Sat, 5 Jan 2019 16:21:28 -0500 Received: from [192.168.20.60] ([92.116.168.54]) by mail.gmx.com (mrgmx102 [212.227.17.168]) with ESMTPSA (Nemesis) id 0LgNGi-1h38n63lfY-00ngfC; Sat, 05 Jan 2019 22:21:13 +0100 Subject: Re: [PATCH] parisc: Improve initial IRQ to CPU assignment To: Dennis Clarke , linux-parisc@vger.kernel.org, James Bottomley , John David Anglin References: <20190104230546.GA18977@p100.box> <76386f22-f894-5202-576a-357782743ec4@blastwave.org> From: Helge Deller Openpgp: preference=signencrypt Autocrypt: addr=deller@gmx.de; keydata= xsBNBFDPIPYBCAC6PdtagIE06GASPWQJtfXiIzvpBaaNbAGgmd3Iv7x+3g039EV7/zJ1do/a y9jNEDn29j0/jyd0A9zMzWEmNO4JRwkMd5Z0h6APvlm2D8XhI94r/8stwroXOQ8yBpBcP0yX +sqRm2UXgoYWL0KEGbL4XwzpDCCapt+kmarND12oFj30M1xhTjuFe0hkhyNHkLe8g6MC0xNg KW3x7B74Rk829TTAtj03KP7oA+dqsp5hPlt/hZO0Lr0kSAxf3kxtaNA7+Z0LLiBqZ1nUerBh OdiCasCF82vQ4/y8rUaKotXqdhGwD76YZry9AQ9p6ccqKaYEzWis078Wsj7p0UtHoYDbABEB AAHNHEhlbGdlIERlbGxlciA8ZGVsbGVyQGdteC5kZT7CwJIEEwECADwCGwMGCwkIBwMCBhUI AgkKCwQWAgMBAh4BAheAFiEE9M/0wAvkPPtRU6Boh8nBUbUeOGQFAlrHzIICGQEACgkQh8nB UbUeOGT1GAgAt+EeoHB4DbAx+pZoGbBYp6ZY8L6211n8fSi7wiwgM5VppucJ+C+wILoPkqiU +ZHKlcWRbttER2oBUvKOt0+yDfAGcoZwHS0P+iO3HtxR81h3bosOCwek+TofDXl+TH/WSQJa iaitof6iiPZLygzUmmW+aLSSeIAHBunpBetRpFiep1e5zujCglKagsW78Pq0DnzbWugGe26A 288JcK2W939bT1lZc22D9NhXXRHfX2QdDdrCQY7UsI6g/dAm1d2ldeFlGleqPMdaaQMcv5+E vDOur20qjTlenjnR/TFm9tA1zV+K7ePh+JfwKc6BSbELK4EHv8J8WQJjfTphakYLVM7ATQRQ zyD2AQgA2SJJapaLvCKdz83MHiTMbyk8yj2AHsuuXdmB30LzEQXjT3JEqj1mpvcEjXrX1B3h +0nLUHPI2Q4XWRazrzsseNMGYqfVIhLsK6zT3URPkEAp7R1JxoSiLoh4qOBdJH6AJHex4CWu UaSXX5HLqxKl1sq1tO8rq2+hFxY63zbWINvgT0FUEME27Uik9A5t8l9/dmF0CdxKdmrOvGMw T770cTt76xUryzM3fAyjtOEVEglkFtVQNM/BN/dnq4jDE5fikLLs8eaJwsWG9k9wQUMtmLpL gRXeFPRRK+IT48xuG8rK0g2NOD8aW5ThTkF4apznZe74M7OWr/VbuZbYW443QQARAQABwsBf BBgBAgAJBQJQzyD2AhsMAAoJEIfJwVG1HjhkNTgH/idWz2WjLE8DvTi7LvfybzvnXyx6rWUs 91tXUdCzLuOtjqWVsqBtSaZynfhAjlbqRlrFZQ8i8jRyJY1IwqgvHP6PO9s+rIxKlfFQtqhl kR1KUdhNGtiI90sTpi4aeXVsOyG3572KV3dKeFe47ALU6xE5ZL5U2LGhgQkbjr44I3EhPWc/ lJ/MgLOPkfIUgjRXt0ZcZEN6pAMPU95+u1N52hmqAOQZvyoyUOJFH1siBMAFRbhgWyv+YE2Y ZkAyVDL2WxAedQgD/YCCJ+16yXlGYGNAKlvp07SimS6vBEIXk/3h5Vq4Hwgg0Z8+FRGtYZyD KrhlU0uMP9QTB5WAUvxvGy8= Message-ID: Date: Sat, 5 Jan 2019 22:21:09 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1 MIME-Version: 1.0 In-Reply-To: <76386f22-f894-5202-576a-357782743ec4@blastwave.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:lqWxHb/0N2DVLbW3iGCh/D2oUQgj0S4RsFVwS1eFUQ44gV6g7W1 TwLQ3EAP5WppxPRvycaXxjx/udaSzUjeUQY2+bODyudcxEkkH85jOSCgZgSji9nncUxpmTR 2+wtT04ACaTz1rFrx/vhcvF3NZIhR9eOsClSlZwiAn3vH8zwMP01+8rNP/ovK99BohAZlhz t1S6WEmFjBz51FdGbubiQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:sZeMa3Zrw5Q=:TipDgJI/elq1tDRwffviVw 9vnkQ97Pcv9KPL0MrzqF/aldtgphrjj5GdkxOMG9n8XRaC7ulsAp18Kjy/W7Ar2WUXU4BKEXf TMttNlQTYRvIV7nWnXrtHRko0rmnu6I80EjOe8e5Hk6qp5ytrpw6P0q2/0Lb3wuMLf6SslaH6 +gXowSDBUZUl48ZGOFNcTV0RlScDtfzGAElE4rc2ExCmm+TCeZ/Wks4sL94WgHbNiVMH09AkG 4Yp9Chg6RZB+A39EWJIatV1I2L4UCK2xBavvV5jaQ92rM6dwmf7kwYmwNdcR8+1V2XMZ33z7U 0cE0KGjpc7/969RtgsdSfphNlH21ndEm1JVj2vr3CVLwtf/+gPUO/s7OCeOLTCqupG1pjyafX 45vyAxjhp+WBbcVn9mzhEO95O47pNrL4KVS3gc2RuvH34jiSgrGSSMxxDg2VBJ7ywONfEfNnv zVVQTSy2P0AQcxeM3bc7Qt2tkCGr4LzTMFI1eCcAfwrADzB+fPhYNsId5hxCoJi91fuxgL9c7 TaGf3zd/clep5PF+j4a+Ry0In8kXPX9vDCFUFK7hb7033S00cJh2Ztx2Hwz+6VsSKPNO2FbiS rTTHFtKQYPS5pBgX2dbYm2N6ZIEOGvBnwE9HuweE8M9A1ukPJGTtAzji7x+O29+ihmUt9YvdE doJ8EN1cqGSa9NUzOwkhaMoR/zU16keXdxndCK+3G5S72MPhhQz/Tsz33ksw9zkE1RapulC1G gv046y+Z354fK12mD06bXlBRhBsWLVEAb1/aolInyC7okgsoHuQgiyjYSJe5s+wjr/o10Qazp BCq0yztHSZBkhoB9DBFxISKe9W+3d1PY+m20bjvV6ldIFLMOlsz0GEygKYEB/w9k1IooUw81r IIwdMEoVvnRzf8mEmK+l1I7LeoMtIztPaMRIWvY3zip5i1zij+dSQu5xWQ53Tp Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org On 05.01.19 00:21, Dennis Clarke wrote: > On 1/4/19 6:05 PM, Helge Deller wrote: >> On parisc, each IRQ can only be handled by one CPU, and currently CPU0 >> is choosen as default for handling all IRQs by default. >> With this patch we now assign each requested IRQ to one of the online >> CPUs (and thus distribute the IRQs across all CPUs), even without an >> instance of irqbalance running. > > Will this take into consideration the features in default_smp_affinity > and allow processor cores to be considered 'non interrupt' service > state? It seems the feature of default_smp_affinity to disable specific cores from servicing interrupts doesn't work on the parisc platform. On a 2-CPU machine I booted with the "irqaffinity=0" kernel commandline option (to enable CPU#0 and disable CPU#1), which then led to a hanging kernel when CPU#1 ist started. On parisc, each CPU needs to handle at least it's timer and IPMI interrupt. Any idea what I should try? Helge