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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 09F70C433DF for ; Wed, 10 Jun 2020 12:38:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D587C2072E for ; Wed, 10 Jun 2020 12:38:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="XSoUosvV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729132AbgFJMil (ORCPT ); Wed, 10 Jun 2020 08:38:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728933AbgFJMij (ORCPT ); Wed, 10 Jun 2020 08:38:39 -0400 Received: from mail-qt1-x844.google.com (mail-qt1-x844.google.com [IPv6:2607:f8b0:4864:20::844]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A7CB9C03E96B for ; Wed, 10 Jun 2020 05:38:38 -0700 (PDT) Received: by mail-qt1-x844.google.com with SMTP id k22so1541952qtm.6 for ; Wed, 10 Jun 2020 05:38:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=74QRp+fFVrmSINpFkFNz/AyQxHDWN5CpI1MCB1mJkcA=; b=XSoUosvVcltD8InvwL3/x1D+LTJ4K9Z8qU1dp/3uX6RVtvk3Spg7UGJM8igm0mhy0d uYIT5d7Xa09xeS+Ka8eSI4Cu+GLB203vZqEXbSFbYojWU+wH9CtEc9ICPIl/0cvdiycB rKiaygLCyrbezsZg1iUIYCtafevgux+t28e1s/akXMI+aYrymGVGzjCzRcwOUBZ5Nz0D b5E3jBGHmJr0j9N998HZX1YudiNnttH/JHcaOeEPQApO59vTNJ8MsQZlUM97V4Ffzhwt bqTE5mzeybw4c47XGH6dfuO4zKcUbpVzdDr1EafuOBKaHelxA6d0QodhgCJbu79xLytv v+Vg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=74QRp+fFVrmSINpFkFNz/AyQxHDWN5CpI1MCB1mJkcA=; b=hoEBucG8KfVzxvly9a6g2wuBs5fhZD9jEGOUhjCIFHBt/Hl+8zWb9q1i/61OzULMch m4jtA5IYc7uEG8nS0SguGJRFhFgLOUSLa8x7wBXIC4cTqi2DXDnum925YU9yIP5dFUD+ FEJY5cVpgpf0IRLRTSBnLUgOWfdQLnWxw+6nwkDjgwm6WLEr8byE5Pbq4Skc9IM9u21S si2+GvCpDCp3WwZJqEyMPodDafUMGWKH4Nzr4inlb6jOIWIIhym+4jHtz4fw/jxqeV+r +zpaOvEgwnsj9g5ktjuVld7uDNbv2UhGLnBBOgs8bR6XH0V/1tBefwrDRO+dyXfYBq4p PjKQ== X-Gm-Message-State: AOAM532dCzCbhjOUb7p8uTgwTmCDESgC/I4Zzb8Ikko+tTAmCX+WnmQy YqMNdywAH8M7BojWh+FvNCbF4g== X-Google-Smtp-Source: ABdhPJx11Ru8V8taKZBApNZoZCZDRjW9r/ulNbSGFoKV/WO0hYpUzCv2eV+/3mRcwKkincysWNLi6Q== X-Received: by 2002:ac8:378f:: with SMTP id d15mr2984163qtc.136.1591792717396; Wed, 10 Jun 2020 05:38:37 -0700 (PDT) Received: from lca.pw (pool-71-184-117-43.bstnma.fios.verizon.net. [71.184.117.43]) by smtp.gmail.com with ESMTPSA id b53sm13101819qtc.65.2020.06.10.05.38.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Jun 2020 05:38:36 -0700 (PDT) Date: Wed, 10 Jun 2020 08:38:33 -0400 From: Qian Cai To: Thomas Gleixner Cc: Peter Zijlstra , LKML , Andy Lutomirski , Andrew Cooper , X86 ML , "Paul E. McKenney" , Alexandre Chartre , Frederic Weisbecker , Paolo Bonzini , Sean Christopherson , Masami Hiramatsu , Petr Mladek , Steven Rostedt , Joel Fernandes , Boris Ostrovsky , Juergen Gross , Brian Gerst , Mathieu Desnoyers , Josh Poimboeuf , Will Deacon , Tom Lendacky , Wei Liu , Michael Kelley , Jason Chen CJ , Zhao Yakui , Alexander Potapenko Subject: Re: [patch V9 10/39] x86/entry: Provide helpers for execute on irqstack Message-ID: <20200610123833.GD954@lca.pw> References: <87zh9cnfmg.fsf@nanos.tec.linutronix.de> <87wo4gnetx.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87wo4gnetx.fsf@nanos.tec.linutronix.de> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 09, 2020 at 10:50:50PM +0200, Thomas Gleixner wrote: > Qian, > > Thomas Gleixner writes: > >> BAD (after oom02) > >> # cat /sys/kernel/debug/stackdepot/info > >> Unique stacks: 140476 > > > > That's indeed odd. I try to reproduce and figure out what really breaks > > here. > > I checked your config file and I think I know where this comes from. Can > you plase disable KASAN just for testing purposes and compare before > after again? It turns out I'll need a few days to be able to get ahold of those affected systems again. I'll be reporting back as soon as possible.