From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f181.google.com (mail-wi0-f181.google.com [209.85.212.181]) by kanga.kvack.org (Postfix) with ESMTP id 31AA16B0291 for ; Fri, 2 Oct 2015 09:36:07 -0400 (EDT) Received: by wicge5 with SMTP id ge5so33698536wic.0 for ; Fri, 02 Oct 2015 06:36:06 -0700 (PDT) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id s4si13373203wjx.172.2015.10.02.06.36.04 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 02 Oct 2015 06:36:05 -0700 (PDT) From: Vlastimil Babka Subject: [PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations Date: Fri, 2 Oct 2015 15:35:48 +0200 Message-Id: <1443792951-13944-2-git-send-email-vbabka@suse.cz> In-Reply-To: <1443792951-13944-1-git-send-email-vbabka@suse.cz> References: <1443792951-13944-1-git-send-email-vbabka@suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, Jerome Marchand , Andrew Morton , Hugh Dickins Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Michal Hocko , "Kirill A. Shutemov" , Cyrill Gorcunov , Randy Dunlap , linux-s390@vger.kernel.org, Martin Schwidefsky , Heiko Carstens , Peter Zijlstra , Paul Mackerras , Arnaldo Carvalho de Melo , Oleg Nesterov , Linux API , Konstantin Khlebnikov , Vlastimil Babka The documentation for /proc/pid/status does not mention that the value of VmSwap counts only swapped out anonymous private pages and not shmem. This is not obvious, so document this limitation. Signed-off-by: Vlastimil Babka Acked-by: Konstantin Khlebnikov Acked-by: Michal Hocko --- Documentation/filesystems/proc.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index a99b208..7ef50cb 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -239,6 +239,8 @@ Table 1-2: Contents of the status files (as of 4.1) VmPTE size of page table entries VmPMD size of second level page tables VmSwap size of swap usage (the number of referred swapents) + by anonymous private data (shmem swap usage is not + included) HugetlbPages size of hugetlb memory portions Threads number of threads SigQ number of signals queued/max. number for queue -- 2.5.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org