linux-kernel - Re: [PATCH] Make swap accounting default behavior configurable

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Message-Id: <20101116171225.274019cf.akpm@linux-foundation.org>
Date:	Tue, 16 Nov 2010 17:12:25 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Daisuke Nishimura <nishimura@....nes.nec.co.jp>
Cc:	Michal Hocko <mhocko@...e.cz>, linux-mm@...ck.org,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-kernel@...r.kernel.org, balbir@...ux.vnet.ibm.com,
	stable@...nel.org
Subject: Re: [PATCH] Make swap accounting default behavior configurable

On Wed, 17 Nov 2010 09:23:39 +0900 Daisuke Nishimura <nishimura@....nes.nec.co.jp> wrote:

> > > 
> > > diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> > > index ed45e98..14eafa5 100644
> > > --- a/Documentation/kernel-parameters.txt
> > > +++ b/Documentation/kernel-parameters.txt
> > > @@ -2385,6 +2385,9 @@ and is between 256 and 4096 characters. It is defined in the file
> > >  			improve throughput, but will also increase the
> > >  			amount of memory reserved for use by the client.
> > >  
> > > +	swapaccount	[KNL] Enable accounting of swap in memory resource
> > > +			controller. (See Documentation/cgroups/memory.txt)
> > 
> > So we have swapaccount and noswapaccount.  Ho hum, "swapaccount=[1|0]"
> > would have been better.
> > 
> I suggested to keep "noswapaccount" for compatibility.
> If you and other guys don't like having two parameters, I don't stick to
> the old parameter.
> 

Yes, we're stuck with the old one now.

But we should note that "foo=[0|1]" is superior to "foo" and "nofoo". 
Even if we didn't initially intend to add "nofoo".

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