From patchwork Tue Oct 11 18:36:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: pso@chromium.org X-Patchwork-Id: 13004246 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 26568C433F5 for ; Tue, 11 Oct 2022 18:39:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229495AbiJKSjq (ORCPT ); Tue, 11 Oct 2022 14:39:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39254 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229732AbiJKSjo (ORCPT ); Tue, 11 Oct 2022 14:39:44 -0400 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C38817062 for ; Tue, 11 Oct 2022 11:39:42 -0700 (PDT) Received: by mail-pl1-x62e.google.com with SMTP id c20so4452714plc.5 for ; Tue, 11 Oct 2022 11:39:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=IzYlQa//u6hTMK79BpSt7XrJJaaCVspYQvsy4Q0xk2k=; b=KFDX91IQNZpMDxkGaPntHDLpehYANUxuryuOgPhKsxXiD3irRAx4QGRz3G1qJEv0rH eufM8CzBmNz4Sx204Ng5fYlMJv4KXz7ogZFZmHAGx9WJFO2RIGG7HSuTgeenkJdln0oX SlJ+bOklGcojQ7BSTZ8gFmTkSBaCDEKLe7EgY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=IzYlQa//u6hTMK79BpSt7XrJJaaCVspYQvsy4Q0xk2k=; b=bLaoKlu2e35sTB3v/fqQncDcD06TccjCvHX8U8XlwSsXXHSvxRyyE4W+4ajYN/NM2h qlzlf5wXjC6HwWYfiAwRjJgxvqZbC4mTWXA+cN9+D5xDeEdkRUOR5/6hHnk5p7vyS8u6 z+UFAjy37fGovA4zIS3qLV2T6G0+QDauRf8xwQSj2TbZA50DjH1UP2ATLMtjaSY4qVFY 94wOh3Nd0bxYdKsJ5br2xhDffBwap+seXAnrwSz8sg+Go/twLBwGhe3KHtsgiw1X7Is6 W+vnA+jaNDRBE6bKk0MY0DdswaO+ddAbEwkbSpkvf3Bn+unlwmebkwEzbotszPZbnPlU 9xMw== X-Gm-Message-State: ACrzQf1GA0LaH39ekuI4mu90PTnADArlezsvSGbVMLPh8MjgdyceXKXl beHYCfoAWCBz8K7oeUSgE3MQrg== X-Google-Smtp-Source: AMsMyM6SefhZzZADOH/1yfaAZfQUUganxehw2L4jlhB4qrkWlxDmMv8G8I2WS9rNNdnfNKztCF50bQ== X-Received: by 2002:a17:90b:17ce:b0:20b:7cb:9397 with SMTP id me14-20020a17090b17ce00b0020b07cb9397mr527694pjb.191.1665513582307; Tue, 11 Oct 2022 11:39:42 -0700 (PDT) Received: from localhost (226.75.127.34.bc.googleusercontent.com. [34.127.75.226]) by smtp.gmail.com with UTF8SMTPSA id i21-20020a170902e49500b001753654d9c5sm8982878ple.95.2022.10.11.11.39.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 Oct 2022 11:39:41 -0700 (PDT) From: pso@chromium.org To: LKML , Linux-Fsdevel Cc: Kees Cook , Dmitry Torokhov , Paramjit Oberoi , Anton Vorontsov , Colin Cross , Tony Luck Subject: [PATCH 0/1] pstore/ram: Ensure stable pmsg address with per-CPU ftrace buffers Date: Tue, 11 Oct 2022 11:36:29 -0700 Message-Id: <20221011183630.3113666-1-pso@chromium.org> X-Mailer: git-send-email 2.38.0.rc1.362.ged0d419d3c-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Paramjit Oberoi Hi pstore maintainers, Resending a little patch from May: without this change, the start address of pmsg varies with the number of CPUs in the system. This is a problem for tools that want to manipulate pstore outside a VM (we are doing this for crash reporting). Paramjit Oberoi (1): pstore/ram: Ensure stable pmsg address with per-CPU ftrace buffers fs/pstore/ram.c | 2 ++ 1 file changed, 2 insertions(+)