Re: [PATCH 1/4] mm, documentation: clarify /proc/pid/status VmSwap limitations
From: Michael Kerrisk
Date: Fri Feb 27 2015 - 05:38:03 EST
[CC += linux-api@]
On Thu, Feb 26, 2015 at 2:51 PM, Vlastimil Babka <vbabka@xxxxxxx> 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 <vbabka@xxxxxxx>
> ---
> I've noticed that proc(5) manpage is currently missing the VmSwap field
> altogether.
>
> Documentation/filesystems/proc.txt | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
> index a07ba61..d4f56ec 100644
> --- a/Documentation/filesystems/proc.txt
> +++ b/Documentation/filesystems/proc.txt
> @@ -231,6 +231,8 @@ Table 1-2: Contents of the status files (as of 2.6.30-rc7)
> VmLib size of shared library code
> VmPTE size of page table entries
> VmSwap size of swap usage (the number of referred swapents)
> + by anonymous private data (shmem swap usage is not
> + included)
> Threads number of threads
> SigQ number of signals queued/max. number for queue
> SigPnd bitmap of pending signals for the thread
> --
> 2.1.4
>
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--
Michael Kerrisk Linux man-pages maintainer;
http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface", http://blog.man7.org/
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