linux-kernel - Re: [PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations

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Date:	Tue, 6 Oct 2015 09:05:23 +0200
From:	Vlastimil Babka <vbabka@...e.cz>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	linux-mm@...ck.org, Jerome Marchand <jmarchan@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	Michal Hocko <mhocko@...e.cz>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Randy Dunlap <rdunlap@...radead.org>,
	linux-s390@...r.kernel.org,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Linux API <linux-api@...r.kernel.org>,
	Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Subject: Re: [PATCH v4 1/4] mm, documentation: clarify /proc/pid/status VmSwap
 limitations

On 10/05/2015 03:05 AM, Hugh Dickins wrote:
> On Fri, 2 Oct 2015, Vlastimil Babka wrote:
>> --- 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)

Good point, thanks!

> for which you can assume Acked-by: Hugh Dickins <hughd@...gle.com>
>
> Hugh
>
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