RE: [patch 4/14] x86, ds: wait before freeing the DS configuration

[Metzger, Markus T]

>-----Original Message-----
>From: Oleg Nesterov [mailto:oleg@xxxxxxxxxx]
>Sent: Friday, March 27, 2009 3:36 PM
>To: Metzger, Markus T
>Cc: linux-kernel@xxxxxxxxxxxxxxx; mingo@xxxxxxx; tglx@xxxxxxxxxxxxx; hpa@xxxxxxxxx;
>markus.t.metzger@xxxxxxxxx; roland@xxxxxxxxxx; eranian@xxxxxxxxxxxxxx; Villacis, Juan;
>ak@xxxxxxxxxxxxxxxxxx
>Subject: Re: [patch 4/14] x86, ds: wait before freeing the DS configuration
>
>On 03/27, Markus Metzger wrote:
>>
>> --- git-tip.orig/arch/x86/kernel/ds.c	2009-03-27 07:59:23.000000000 +0100
>> +++ git-tip/arch/x86/kernel/ds.c	2009-03-27 08:00:41.000000000 +0100
>> @@ -783,6 +783,14 @@ void ds_release_bts(struct bts_tracer *t
>>
>>  	ds_suspend_bts(tracer);
>>
>> +	/*
>> +	 * We must wait for the suspend to take effect before we may
>> +	 * free the tracer and the ds configuration.
>> +	 */
>> +	if (tracer->ds.context->task &&
>> +	    (tracer->ds.context->task != current))
>> +		wait_task_inactive(tracer->ds.context->task, 0);
>> +
>
>Since you didn't replay yet, I will just repeat my question ;)

I replied in http://lkml.org/lkml/2009/3/27/220.

regards,
markus.

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