linux-kernel - Re: [PATCH 4/9] kstaled: minimalistic implementation.

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Message-ID: <CANN689Gtv2B1j6Z5wTk1ysne+XVV8VfU+9jepY1RV4r=B7V_Zw@mail.gmail.com>
Date:	Wed, 28 Sep 2011 01:01:29 -0700
From:	Michel Lespinasse <walken@...gle.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Rik van Riel <riel@...hat.com>,
	Balbir Singh <bsingharora@...il.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <jweiner@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Hugh Dickins <hughd@...gle.com>,
	Michael Wolf <mjwolf@...ibm.com>
Subject: Re: [PATCH 4/9] kstaled: minimalistic implementation.

On Wed, Sep 28, 2011 at 12:41 AM, Peter Zijlstra <a.p.zijlstra@...llo.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

-- 
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
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