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=-13.2 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_IN_DEF_DKIM_WL 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 C1C23C433ED for ; Thu, 29 Apr 2021 20:48:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9DA4161424 for ; Thu, 29 Apr 2021 20:48:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236819AbhD2UtF (ORCPT ); Thu, 29 Apr 2021 16:49:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39602 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236737AbhD2UtA (ORCPT ); Thu, 29 Apr 2021 16:49:00 -0400 Received: from mail-qt1-x832.google.com (mail-qt1-x832.google.com [IPv6:2607:f8b0:4864:20::832]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD486C06138B for ; Thu, 29 Apr 2021 13:48:13 -0700 (PDT) Received: by mail-qt1-x832.google.com with SMTP id a18so26424245qtj.10 for ; Thu, 29 Apr 2021 13:48:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=FFc2H/uuDNG6mhR7R+crmY+ptoL0P1RcjoOttIU6eIY=; b=qabzS5m9gj1GEL2TvdC78tTot/7F3iPVfyyWrV+VuOSkCUCVa2Vogt/gv+PFTFhOsO kv0ZzJGAcWlfdJ6YhH7clJSZ0tUwD6McMOJtzSLu6o436UpCYggWaUkSoUP85idJqvIA 8lVHkx5nC3BtPnKwAKPQjl3vaS4dlGQtmIeEQpKbQmyHQbuegusUjASy4mF6IwKtsuyV LwpIZordeLPeYi4/jfbxiGwMao3v/4ypT3zx7r0OPkWDQ6/Us82DJcxYvcMGXmwYYlZO xx44NOSUmNi/S1cslX/eC8MMqr2bXspPNvIyUTIwGzwIQ1dPHPyn6LMraO/boZh/dQWF DoGg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=FFc2H/uuDNG6mhR7R+crmY+ptoL0P1RcjoOttIU6eIY=; b=Ho+zkMZ+b/MQkh7dEDcUFLqe5lPQgNdW/GCctLdPKG1REHwWEv/Qapef5upCTNcybl 2ISehKpxzj+RDF4dUErszDL0R4OCYDxD2eHAFZWpyWYezVlImKMfraLgHoousTEHYAGp F+XttYh9atS2L1Gwa2OtIp5e7TRtRrncucL02H0sxE5DRYoihPmhU9ic8XL9SR819HSD 1S67a1PGy7Kf+P13/JnZEuSb8Ipm5q6oSemYv3Fbph6MGWAwItH57gFhsvOStc9xSssE lmqs2wM2FjTbWM/Ynmma6H6ITvaqu9VvWnu9pMxs7O+dwafv0fAn5UqQLHevbwPG37US pBNA== X-Gm-Message-State: AOAM531F7qxlzUb8C2krQFSgHeBDiFazJTF/+snRDXHfuzjnICjh1iON kOqbhu8KEtWrBi5G5ZSiXKcVu8NYoBCAkpfotqkZfA== X-Google-Smtp-Source: ABdhPJxj/Y6dadoRniiAgYeHloz7Nu/aZPXFISYFljo/JngdamCEoqCLsGPlR5JbvP1mzAfMruIjzYU81em3NHzCHoc= X-Received: by 2002:a05:622a:c8:: with SMTP id p8mr1286166qtw.145.1619729292799; Thu, 29 Apr 2021 13:48:12 -0700 (PDT) MIME-Version: 1.0 References: <20210422120459.447350175@infradead.org> <20210422123308.196692074@infradead.org> <5c289c5a-a120-a1d0-ca89-2724a1445fe8@linux.intel.com> In-Reply-To: From: Josh Don Date: Thu, 29 Apr 2021 13:48:01 -0700 Message-ID: Subject: Re: [PATCH 04/19] sched: Prepare for Core-wide rq->lock To: Don Hiatt Cc: Aubrey Li , Aubrey Li , Peter Zijlstra , Joel Fernandes , "Hyser,Chris" , Ingo Molnar , Vincent Guittot , Valentin Schneider , Mel Gorman , linux-kernel , Thomas Gleixner Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 28, 2021 at 9:41 AM Don Hiatt wrote: > > I'm still seeing hard lockups while repeatedly setting cookies on qemu > processes even with > the updated patch. If there is any debug you'd like me to turn on, > just let me know. > > Thanks! > > don Thanks for the added context on your repro configuration. In addition to the updated patch from earlier, could you try the modification to double_rq_lock() from https://lkml.kernel.org/r/CABk29NuS-B3n4sbmavo0NDA1OCCsz6Zf2VDjjFQvAxBMQoJ_Lg@mail.gmail.com ? I have a feeling this is what's causing your lockup. Best, Josh