From patchwork Tue Apr 20 08:51:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 12213565 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43006C433B4 for ; Tue, 20 Apr 2021 08:51:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A55B611C9 for ; Tue, 20 Apr 2021 08:51:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231232AbhDTIvp (ORCPT ); Tue, 20 Apr 2021 04:51:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:50786 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231216AbhDTIvo (ORCPT ); Tue, 20 Apr 2021 04:51:44 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0621D60FEE; Tue, 20 Apr 2021 08:51:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1618908673; bh=5d/i9+HgBPPIbeM5Ncltph3uy36+LjfabKTydziTuzI=; h=From:To:Cc:Subject:Date:From; b=K1GZLg5BNfcud3M+O+d48O4++/eNqXZTd0y+x+sDL+0hutPGtDnOzKPZ8ynHgIbte rVkB0R4hTvb9ID6UpoLeIItj8UMTiY7/aZJcbH09TZ1n/8mUhdDRfV2Jca4EYp6Uwp 07xQQiCr4w6952ejc3HYS/3F+xNMXj8aSdLVjpaQHM1ro93Hr2FD4uTPStnswJGa0F y4vAWNs+v0UT/VxbWqIp2R1ivdRRI8TcIxHuqYt0J6K6LbWoL5gahUST344zq95mBZ wkmyYb52fGW51+1OrOyL6I1VCgH8rWg+Gg76sQB29YS5fkFKZ5kNwTWSLbBklYG3kS vEPoCpExdLHrA== From: Mike Rapoport To: Jonathan Corbet Cc: Alexey Dobriyan , Andrew Morton , Michal Hocko , Mike Rapoport , Mike Rapoport , linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH] docs: proc.rst: meminfo: briefly describe gaps in memory accounting Date: Tue, 20 Apr 2021 11:51:05 +0300 Message-Id: <20210420085105.1156640-1-rppt@kernel.org> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Mike Rapoport Signed-off-by: Mike Rapoport Acked-by: Michal Hocko --- Documentation/filesystems/proc.rst | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst index 48fbfc336ebf..bf245151645b 100644 --- a/Documentation/filesystems/proc.rst +++ b/Documentation/filesystems/proc.rst @@ -929,8 +929,15 @@ meminfo ~~~~~~~ Provides information about distribution and utilization of memory. This -varies by architecture and compile options. The following is from a -16GB PIII, which has highmem enabled. You may not have all of these fields. +varies by architecture and compile options. Please note that is may happen +that the memory accounted here does not add up to the overall memory usage +and the difference for some workloads can be substantial. In many cases +there are other means to find out additional memory using subsystem +specific interfaces, for instance /proc/net/sockstat for networking +buffers. + +The following is from a 16GB PIII, which has highmem enabled. +You may not have all of these fields. ::