linux-kernel - Re: [PATCH 11/11] maps3: make page monitoring /proc file optional

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Message-Id: <200710161003.39992.rusty@rustcorp.com.au>
Date:	Tue, 16 Oct 2007 10:03:39 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Dave Hansen <haveblue@...ibm.com>, Matt Mackall <mpm@...enic.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, David Rientjes <rientjes@...gle.com>,
	Fengguang Wu <wfg@...l.ustc.edu.cn>
Subject: Re: [PATCH 11/11] maps3: make page monitoring /proc file optional

On Tuesday 16 October 2007 08:51:17 Jeremy Fitzhardinge wrote:
> Dave Hansen wrote:
> > On Mon, 2007-10-15 at 17:26 -0500, Matt Mackall wrote:
> >> +config PROC_PAGE_MONITOR
> >> +       default y
> >> +       bool "Enable /proc page monitoring" if EMBEDDED && PROC_FS &&
> >> MMU +       help
> >> +         Various /proc files exist to monitor process memory
> >> utilization: +         /proc/pid/smaps, /proc/pid/clear_refs,
> >> /proc/pid/pagemap, +         /proc/kpagecount, and /proc/kpageflags.
> >> Disabling these +          interfaces will reduce the size of the kernel
> >> by approximately 4kb.
> >
> > How about pulling the EMBEDDED off there?  I certainly want it for
> > non-embedded reasons. ;)
>
> That means it will only bother asking you if you've set EMBEDDED;
> otherwise its always on.

But it's at the least confusing.  Surely this option should depend on MMU and 
PROC_FS, and the prompt depend on EMBEDDED?

That might be implied by the Kconfig layout, but AFAICT this patch removed the 
explicit MMU dependency.

Rusty.

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