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

On Wed, Sep 28, 2011 at 12:41 AM, Peter Zijlstra <a.p.zijlstra@chello.nl> w=
rote:
> On Tue, 2011-09-27 at 17:49 -0700, Michel Lespinasse wrote:
>> +static int kstaled(void *dummy)
>> +{
>> + =A0 =A0 =A0 while (1) {
>
>> + =A0 =A0 =A0 }
>> +
>> + =A0 =A0 =A0 BUG();
>> + =A0 =A0 =A0 return 0; =A0 =A0 =A0 /* 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

--=20
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.

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