From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from read.uberspace.de (read.uberspace.de [185.26.156.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BCE31197 for ; Wed, 14 Aug 2024 00:33:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.26.156.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723595615; cv=none; b=ZE8e7wQmbAN7MMCIef0ASxk/8KxLviZlCVB0HjRSrH0Gxv4l/lU7O7wCWZUNFmqHoxkmnty8Mw6ziQuiIlcCq5ixj0VrVUM2nhl6wQzb/U7dm7Ikc42BH7qm413vnJtCMePIBB7fqwIN2hVOz3mzt28UNI7eF+IubuKGO4cidKY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723595615; c=relaxed/simple; bh=mZxBMSBOXUjPtNMzQYsC/w4amo62xoxfgDzla/4sRKo=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=Ib/lhGs1op+SHA5lZ6S/dQo7ZefulmfYkEYluJQclz9pSVbhz0bbvpghu2omrwqqjs9qLKQXn0er4jt8k/XDEXGEF3yUqdy5DAfrvLrgqbwpq4P/bhd5ek23WTGEvlBiHX5+eP7kTRiQf5DOeCqNLQhRq3576u5EA27jR/ke++U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=florommel.de; spf=pass smtp.mailfrom=florommel.de; dkim=pass (4096-bit key) header.d=florommel.de header.i=@florommel.de header.b=gRFugSD/; arc=none smtp.client-ip=185.26.156.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=florommel.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=florommel.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=florommel.de header.i=@florommel.de header.b="gRFugSD/" Received: (qmail 6617 invoked by uid 990); 14 Aug 2024 00:33:29 -0000 Authentication-Results: read.uberspace.de; auth=pass (plain) Received: from unknown (HELO unkown) (::1) by read.uberspace.de (Haraka/3.0.1) with ESMTPSA; Wed, 14 Aug 2024 02:33:29 +0200 Message-ID: Subject: Re: [PATCH 0/2] kgdb: x86: fix breakpoint removal problems From: Florian Rommel To: Andrew Morton Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H . Peter Anvin" , Jason Wessel , Daniel Thompson , Douglas Anderson , Lorena Kretzschmar , Stefan Saecherl , Peter Zijlstra , Christophe JAILLET , Randy Dunlap , Masami Hiramatsu , Christophe Leroy , Geert Uytterhoeven , kgdb-bugreport@lists.sourceforge.net, x86@kernel.org, linux-kernel@vger.kernel.org Date: Wed, 14 Aug 2024 02:33:29 +0200 In-Reply-To: <20240813171055.f8805c1db539dfa18e80026b@linux-foundation.org> References: <20240811232208.234261-1-mail@florommel.de> <20240813171055.f8805c1db539dfa18e80026b@linux-foundation.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.4 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Rspamd-Bar: + X-Rspamd-Report: SUSPICIOUS_RECIPS(1.5) BAYES_HAM(-0.138129) MIME_GOOD(-0.1) X-Rspamd-Score: 1.26187 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=florommel.de; s=uberspace; h=from:to:cc:subject:date; bh=mZxBMSBOXUjPtNMzQYsC/w4amo62xoxfgDzla/4sRKo=; b=gRFugSD/tFere1sDgEeavx+9foLS7dCf39ZuQyBbk24KBMq0GPAaDRviGhNNPNOf/tmQR8NVBS yEPWObIrPYUHPIwSBkTG6qi7uEg9/sGe5nCNsPCg5+EMypljVKsHiLU1tExSECKFDv5DMOHVB/Gj xV712O5dIx1V9i86TrdMDqw+z+Fg2P0Lgib740/zYXAC/LDSquElO2jaZMaPo9xhW3WMAkkHxFUG 3zFRVtkJxlUhUYDrv/l3Vlt+xE0TLoCZtxepeV8+wUJH/JvaM+jisIG2Hcfp26CGAatyQ2fD3KGy DBf951Q5cTmuh+EZKOya/Oc4WH4Vuy4RS/8VqRYFybcOY9aJWSqNn7X8lY9jdi06bwBstMDJ22Fb i7KKLjfHKujr6MwkTaIWSCDrDkKKsc6iJ30/wZpDtYfpmEhoHr6k/jiWdeNL06ekJ/EJwFmNkyO8 CpVkPPYipmzVJczFD2EDfNt3VKjGFe6s27dGRsutnGMNcVaRg/iTf3FM8sqlCZsta7KZ3Am7lSzt AW1E6DFHBsHIL2MLCTnow+n9lH3HAB6nP0U9dAiqOZgCwO8Kb5QDMsVBbtPRPIjAJH4WmisHz4d+ IdkBh0+P9JuJ5t/gIS/eNGUAPy5b5s1d8dzMAX7VOJUaD8Kfe6wsOhcpGmCtmvOIKw4aEieg10gZ o= On Tue, 2024-08-13 at 17:10 -0700, Andrew Morton wrote: > On Mon, 12 Aug 2024 01:22:06 +0200 Florian Rommel wro= te: >=20 > > This series fixes two problems with KGDB on x86 concerning the removal > > of breakpoints, causing the kernel to hang. Note that breakpoint > > removal is not only performed when explicitly deleting a breakpoint, > > but also happens before continuing execution or single stepping. >=20 > Neat. It would be nice to fix earlier kernels; for that it is > desirable to identify a Fixes: target. From a quick look it appears > this issue is more than a decade old, in which case I don't believe a > Fixes: is needed - our request becomes "please backport to everything". >=20 Thanks. There is already a v2 (due to my negligence on the details) and a bit of discussion: https://lore.kernel.org/all/20240812174338.363838-1-mail@florommel.de/ Rgeards, Florian