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 88948C67861 for ; Tue, 9 Apr 2024 21:21:34 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 17A386B0083; Tue, 9 Apr 2024 17:21:34 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 12A2B6B0085; Tue, 9 Apr 2024 17:21:34 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 018596B0087; Tue, 9 Apr 2024 17:21:33 -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 D91786B0083 for ; Tue, 9 Apr 2024 17:21:33 -0400 (EDT) Received: from smtpin03.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 8BC4EA0DB0 for ; Tue, 9 Apr 2024 21:21:33 +0000 (UTC) X-FDA: 81991264866.03.9C335E8 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by imf09.hostedemail.com (Postfix) with ESMTP id A615814000F for ; Tue, 9 Apr 2024 21:21:31 +0000 (UTC) Authentication-Results: imf09.hostedemail.com; dkim=none; spf=pass (imf09.hostedemail.com: domain of "SRS0=qg+T=LO=goodmis.org=rostedt@kernel.org" designates 145.40.73.55 as permitted sender) smtp.mailfrom="SRS0=qg+T=LO=goodmis.org=rostedt@kernel.org"; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1712697692; 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=7q6dEvMz5+gV+brur5s/cGBNb+tdLULuS45DIFZGvkc=; b=QsxmEDt5o0jbLOebWTDwCVK3wVhP1JlR9CxWU9CsgnTeh8BxFGgvKW9sWYKHFyJb9+IBE3 psnrH+RwMbuw+rqqn60QiIENTx53TuaA7gAX9nxX/VYL+c+L6HDCgWukx60ApQKUBOMpPN Pu0N71KBVSm1kCN7W90iMHYgm+a0PHU= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1712697692; a=rsa-sha256; cv=none; b=PA975e2coUOBEll8Kuf0QVNAeea0dpSw+nS6Rj83OQiCQ4oTHM5vGnPq4ZhIdyYSm0s+Md oTDQK365ihGNs4FTLxwFyPRLrKgCKxSq8RUC1MSXsaFySIZ78Sj8neFyZNTK+QhPGfpz+M OMtIv/6DxQX1rXOX4YYA0aVENGdbkwU= ARC-Authentication-Results: i=1; imf09.hostedemail.com; dkim=none; spf=pass (imf09.hostedemail.com: domain of "SRS0=qg+T=LO=goodmis.org=rostedt@kernel.org" designates 145.40.73.55 as permitted sender) smtp.mailfrom="SRS0=qg+T=LO=goodmis.org=rostedt@kernel.org"; dmarc=none Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 9F326CE231C; Tue, 9 Apr 2024 21:21:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D4725C433C7; Tue, 9 Apr 2024 21:21:23 +0000 (UTC) Date: Tue, 9 Apr 2024 17:23:58 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: 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 , Kees Cook , 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 Subject: Re: [POC][RFC][PATCH 0/2] pstore/mm/x86: Add wildcard memmap to map pstore consistently Message-ID: <20240409172358.34ea19f0@gandalf.local.home> In-Reply-To: <20240409210254.660888920@goodmis.org> References: <20240409210254.660888920@goodmis.org> X-Mailer: Claws Mail 3.19.1 (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-Stat-Signature: pqqmsb51ikzefpkoz38zbwbwxw3sbbna X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: A615814000F X-Rspam-User: X-HE-Tag: 1712697691-521455 X-HE-Meta: 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 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 Tue, 09 Apr 2024 17:02:54 -0400 Steven Rostedt wrote: > memmap=12M*4096:oops ramoops.mem_name=oops I forgot to mention that this makes it trivial for any machine that doesn't clear memory on soft-reboot, to enable console ramoops (to have access to the last boot dmesg without needing serial). I tested this on a couple of my test boxes and on QEMU, and it works rather well. -- Steve