linux-kernel - Re: [PATCH] Correct description of SwapFree in Documentation/filesystems/proc.txt

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Message-ID: <20121116101008.GA2011@dhcp22.suse.cz>
Date:	Fri, 16 Nov 2012 11:10:08 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	Michael Kerrisk <mtk.manpages@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	lkml <linux-kernel@...r.kernel.org>, linux-doc@...r.kernel.org,
	Rob Landley <rob@...dley.net>, Jim Paris <jim@...n.com>
Subject: Re: [PATCH] Correct description of SwapFree in
 Documentation/filesystems/proc.txt

On Fri 16-11-12 08:01:42, Michael Kerrisk wrote:
> After migrating most of the information in 
> Documentation/filesystems/proc.txt to the proc(5) man page,
> Jim Paris pointed out to me that the description of SwapFree
> in the man page seemed wrong. I think Jim is right,
> but am given pause by fact that that text has been in 
> Documentation/filesystems/proc.txt since at least 2.6.0.
> Anyway, I believe that the patch below fixes things.

Yes, this goes back to 2003 when the /proc/meminfo doc has been added.

> 
> Signed-off-by: Michael Kerrisk <mtk.manpages@...il.com>

Reviewed-by: Michal Hocko <mhocko@...e.cz>

> diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
> index a1793d6..cf4260f 100644
> --- a/Documentation/filesystems/proc.txt
> +++ b/Documentation/filesystems/proc.txt
> @@ -778,8 +778,7 @@ AnonHugePages:   49152 kB
>                other things, it is where everything from the Slab is
>                allocated.  Bad things happen when you're out of lowmem.
>     SwapTotal: total amount of swap space available
> -    SwapFree: Memory which has been evicted from RAM, and is temporarily
> -              on the disk
> +    SwapFree: Amount of swap space that is currently unused.
>         Dirty: Memory which is waiting to get written back to the disk
>     Writeback: Memory which is actively being written back to the disk
>     AnonPages: Non-file backed pages mapped into userspace page tables
> 
> --
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-- 
Michal Hocko
SUSE Labs
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