Received: by 2002:a05:6a10:8c0a:0:0:0:0 with SMTP id go10csp1925975pxb; Fri, 29 Jan 2021 08:33:38 -0800 (PST) X-Google-Smtp-Source: ABdhPJynn64FoQ5B6uG8G6HgaAsYGyYFgJbd/pzCYqfUnOu7MAza6vxu035MXRVsTp1WNqQWdb9S X-Received: by 2002:a17:906:3ad0:: with SMTP id z16mr5525124ejd.72.1611938018180; Fri, 29 Jan 2021 08:33:38 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1611938018; cv=none; d=google.com; s=arc-20160816; b=KVdjr3blGyZcmjYgibv2afK/Q2QEPels4Ae32SuTY6QRF6BJNe6zVSFNmDHxzRtyGI JAHrW/Vo0ZvdbAA2TpePGoqL3eoZ39mZpsQGdBmPOBAzpX7ShzGUjtuMhqBEB3JPRg7h UeWv7e6j0rvE1XJVcq5kStVZjpcHrcvePiuEjvSM9jzGcSAX2WyqEwUraM/M9tlvGmw2 l2ah382uTkwgyoxjWu4zACxLU/ompZWtEjd6L7maEZAmPL82oUr39EjgtpR7vY/ThO6k tU1r7HGJDM/qbgPeLQjSW/v9551aicr8C/qwlQPymA4DTufZir5frNz/f4LgnBGjhAEN ZIEA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=4e86qgr+0O2uLt7u9r31adGnaMdt4pUNUGxNQQ8uQ0I=; b=dUSBanPMvh5v3ecsuaqsnUjoudhlu1bADcAyZXozLilgk2cnlYGejejQxwy6APNIAY 4XDL1YbioD9cnYzJQ1Sb4V9xUTHleRFuoQA1ZXNtHajdPLj3+3DNHVkoFicug4skn7pp hypk3mn1NXJh09jh9MDcNNJ3Ar+S1vY1BpziK47ivBlAZ72PQ1gvCgAaF30Kg4C5G72o Jj5s4Qlw2g+6gJCrf9vjmaptiRU4k/EhBhrF4kjH6pyVF74+xq8HCet1kWMufw0LgCXZ pphHmkQp1+/3y1p44UdFjoSdazgKF+S44vDZSmfHQnsEqWvP0tky8tpizgv6DTI59tdK NgPA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=jiVCeiUa; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id y11si5664222ejd.56.2021.01.29.08.32.29; Fri, 29 Jan 2021 08:33:38 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=jiVCeiUa; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229825AbhA2Q2f (ORCPT + 99 others); Fri, 29 Jan 2021 11:28:35 -0500 Received: from mail.skyhub.de ([5.9.137.197]:43030 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229636AbhA2Q23 (ORCPT ); Fri, 29 Jan 2021 11:28:29 -0500 Received: from zn.tnic (p200300ec2f0c9a00bc6c1bcbdaab9684.dip0.t-ipconnect.de [IPv6:2003:ec:2f0c:9a00:bc6c:1bcb:daab:9684]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 8B0FB1EC04D3; Fri, 29 Jan 2021 17:27:45 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1611937665; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=4e86qgr+0O2uLt7u9r31adGnaMdt4pUNUGxNQQ8uQ0I=; b=jiVCeiUa/IxTWSmrhS7F68BFTnbxTZd4G1ifeH4/x2/CX9zHdzikiKKvJriE9p5Sbqjsk6 P2HFCCGPcoeS39iUFc6Ns/h6NKfWQLtAcoynkh7Btzl3mQ1iiySS1rbTp7dL2Gfzzsnu27 08T8Dr4tgPnjDtmOeNDd0cgnUQZFmzA= Date: Fri, 29 Jan 2021 17:27:41 +0100 From: Borislav Petkov To: Oleg Nesterov Cc: Peter Zijlstra , Jan Kratochvil , x86@kernel.org, tdevries@suse.de, linux-kernel@vger.kernel.org, andrew.cooper3@citrix.com, Frederic Weisbecker , Thomas Gleixner Subject: Re: [PATCH v2] x86/debug: Fix DR6 handling Message-ID: <20210129162741.GC27841@zn.tnic> References: <20210128211627.GB4348@worktop.programming.kicks-ass.net> <20210129154109.GA1391@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210129154109.GA1391@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 29, 2021 at 04:41:09PM +0100, Oleg Nesterov wrote: > This seems to fix the problem reported by Jan, see his test-case below. Should it be part of tools/testing/selftests/breakpoints/ ? tglx has one destined for there already, wouldn't hurt to have a second one: https://lkml.kernel.org/r/87eei4d4k6.fsf@nanos.tec.linutronix.de after applying kernel coding style to that one. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette