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Subject: Re: [PATCH 4/9] kstaled: minimalistic implementation.
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Michel Lespinasse <walken@google.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Andrew Morton <akpm@linux-foundation.org>,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
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        KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
        Hugh Dickins <hughd@google.com>, Michael Wolf <mjwolf@us.ibm.com>
Date: Wed, 28 Sep 2011 12:26:13 +0200
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On Wed, 2011-09-28 at 01:01 -0700, Michel Lespinasse wrote:
> On Wed, Sep 28, 2011 at 12:41 AM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> > On Tue, 2011-09-27 at 17:49 -0700, Michel Lespinasse wrote:
> >> +static int kstaled(void *dummy)
> >> +{
> >> +       while (1) {
> >
> >> +       }
> >> +
> >> +       BUG();
> >> +       return 0;       /* NOT REACHED */
> >> +}
> >
> > So if you build with this junk (as I presume distro's will), there is no
> > way to disable it?
> 
> There will be a thread, and it'll block in wait_event_interruptible()
> until a positive value is written into
> /sys/kernel/mm/kstaled/scan_seconds

And here I though people wanted less pointless kernel threads..