From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f51.google.com (mail-pa0-f51.google.com [209.85.220.51]) by kanga.kvack.org (Postfix) with ESMTP id E8DB5440313 for ; Sun, 4 Oct 2015 21:05:57 -0400 (EDT) Received: by padhy16 with SMTP id hy16so19018883pad.1 for ; Sun, 04 Oct 2015 18:05:57 -0700 (PDT) Received: from mail-pa0-x235.google.com (mail-pa0-x235.google.com. [2607:f8b0:400e:c03::235]) by mx.google.com with ESMTPS id ct3si35978764pad.103.2015.10.04.18.05.56 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 04 Oct 2015 18:05:57 -0700 (PDT) Received: by pablk4 with SMTP id lk4so158363326pab.3 for ; Sun, 04 Oct 2015 18:05:56 -0700 (PDT) Date: Sun, 4 Oct 2015 18:05:46 -0700 (PDT) From: Hugh Dickins Subject: Re: [PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations In-Reply-To: <1443792951-13944-2-git-send-email-vbabka@suse.cz> Message-ID: References: <1443792951-13944-1-git-send-email-vbabka@suse.cz> <1443792951-13944-2-git-send-email-vbabka@suse.cz> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Vlastimil Babka Cc: linux-mm@kvack.org, Jerome Marchand , Andrew Morton , Hugh Dickins , 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 On Fri, 2 Oct 2015, Vlastimil Babka wrote: > 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) I have difficulty in reading "size of swap usage (the number of referred swapents) by anonymous private data (shmem swap usage is not included)". Luckily, VmSwap never was "the number of referred swapents", it's in kB. So I suggest amount of swap used by anonymous private data (shmem swap usage is not included) for which you can assume Acked-by: Hugh Dickins Hugh > 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