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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0144C27C53 for ; Wed, 12 Jun 2024 18:52:37 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 54B386B00A5; Wed, 12 Jun 2024 14:52:37 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4FABB6B00A7; Wed, 12 Jun 2024 14:52:37 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3C3176B00A8; Wed, 12 Jun 2024 14:52:37 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 1F1736B00A5 for ; Wed, 12 Jun 2024 14:52:37 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 984571C0B5E for ; Wed, 12 Jun 2024 18:52:36 +0000 (UTC) X-FDA: 82223132712.03.88BE569 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf27.hostedemail.com (Postfix) with ESMTP id F41CA40018 for ; Wed, 12 Jun 2024 18:52:34 +0000 (UTC) Authentication-Results: imf27.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf27.hostedemail.com: domain of "SRS0=9b5n=NO=goodmis.org=rostedt@kernel.org" designates 139.178.84.217 as permitted sender) smtp.mailfrom="SRS0=9b5n=NO=goodmis.org=rostedt@kernel.org" ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1718218355; h=from:from:sender: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:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/PWbqMMFQclj8VRGDHcgsqWGpBy26Z/G/T84NEELnc4=; b=r6N+cmc5mFlJ7/jDphWx6MdmJTnDSlxq/LgWF5SR7AVc76BFXg6a3i592TtYFN31Gd5VFC TCMzCxukgDKeYM1JpP5IC3Vt5kXFGtX0MJ7DISG3HsIK/cI7gtO/F6Xbt98dXgqsbBHcYB eVF0Ryd7lkJxCxF9qItNRee/1KTWRG4= ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf27.hostedemail.com: domain of "SRS0=9b5n=NO=goodmis.org=rostedt@kernel.org" designates 139.178.84.217 as permitted sender) smtp.mailfrom="SRS0=9b5n=NO=goodmis.org=rostedt@kernel.org" ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1718218355; a=rsa-sha256; cv=none; b=TBJP0rtlq/5nLfLJ8rVkv6g+bVr7ivW0uPrcn0SHE5iKzmHAB3/L02F/HAgbldJpuswVCJ 9mhEnYZWXKnHfp/7AHwYMwI8PCEJe89Du7W5kpJYrntuvmrwsnoFFdg9m0Oq0FyPwFqh2P Xx1H4ZVRhInrzPgCMoEtkw7Q4o+uh2A= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id BAB65616DB; Wed, 12 Jun 2024 18:52:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB7ADC4AF50; Wed, 12 Jun 2024 18:52:29 +0000 (UTC) Date: Wed, 12 Jun 2024 14:52:28 -0400 From: Steven Rostedt To: Kees Cook Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Lorenzo Stoakes , linux-mm@kvack.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Peter Zijlstra , Tony Luck , "Guilherme G. Piccoli" , linux-hardening@vger.kernel.org, Guenter Roeck , Ross Zwisler , wklin@google.com, Vineeth Remanan Pillai , Joel Fernandes , Suleiman Souhlal , Linus Torvalds , Catalin Marinas , Will Deacon , Ard Biesheuvel , Mike Rapoport Subject: Re: [PATCH v3 2/2] pstore/ramoops: Add ramoops.mem_name= command line option Message-ID: <20240612145228.5bf426e0@rorschach.local.home> In-Reply-To: <202406121145.8860502D7@keescook> References: <20240611144911.327227285@goodmis.org> <20240611144949.703297941@goodmis.org> <202406121145.8860502D7@keescook> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: F41CA40018 X-Stat-Signature: 9fq7ek9j4jos1c4n1oz359rox7hjg7zh X-Rspam-User: X-Rspamd-Server: rspam11 X-HE-Tag: 1718218354-541528 X-HE-Meta: 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 Lp0NyC+6 u4hcbwzS1rkx2lbsJ2RhrrUgwf5xWGP9gIAN6mv3quFaW5IUkS59Op1a2kQ3FSSlJoNHVy+aDhmzVgQMxwK7h6KEDI7B5k5NxV4nZdugkj4CA08cwwdaEeKK9/K2VZhqv6ttP+1+oYY7BBudgHwihR/KU1UKN5XK2PK60+he7Bfcn+OJ83OMtz6NUrWblf/iTF3xmIAPhNda9O3LmE4KTlfEWJpeo/xR1TRo+CDGlcqknD/kp4/uWuivOU03WGHuCvzpVk4Zdw2d2uvxVbroHpLyjl9dT8KLOo1cblh9icdsTTQnPlergzSBa6RFVwdfI6ByyM3889Fj+MMitoVxfRl5QwvAb1SRSj1+A7w62pcAMR6/cMdD2BnfWFodWtf0YfYyAqq8nKrXnng4kLCoAdnYvtOcloxNwIEXd X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 12 Jun 2024 11:45:57 -0700 Kees Cook wrote: > On Tue, Jun 11, 2024 at 10:49:13AM -0400, Steven Rostedt wrote: > > From: "Steven Rostedt (Google)" > > > > Add a method to find a region specified by reserve_mem=nn:align:name for > > ramoops. Adding a kernel command line parameter: > > > > reserve_mem=12M:4096:oops ramoops.mem_name=oops > > > > Will use the size and location defined by the memmap parameter where it > > finds the memory and labels it "oops". The "oops" in the ramoops option > > is used to search for it. > > > > This allows for arbitrary RAM to be used for ramoops if it is known that > > the memory is not cleared on kernel crashes or soft reboots. > > > > Signed-off-by: Steven Rostedt (Google) > > Acked-by: Kees Cook > > Let me know if this should go via the pstore tree, if you'd rather carry > it? > I'm going to send out another version to cover some more comments that were made, and perhaps it's best if Mike Rapoport takes it through his tree. Thanks! -- Steve