linux-kernel - Re: Q: user_enable_single_step() && update

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Message-ID: <20120802132434.GA3019@redhat.com>
Date:	Thu, 2 Aug 2012 15:24:34 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:	Roland McGrath <roland@...k.frob.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	ananth@...ibm.com, a.p.zijlstra@...llo.nl, mingo@...hat.com,
	srikar@...ux.vnet.ibm.com
Subject: Re: Q: user_enable_single_step() && update_debugctlmsr()

On 08/02, Sebastian Andrzej Siewior wrote:
>
>>> From the link above,
>>
>> 	We have the GDB process and the (stopped) tracee T. And we have
>> 	another task X
>>          ^^^^^^^^^^^^^^
>
> Yes that is correct. Let me try to figure out how to plumb that leak
> and fix this before playing with it further.

I'll send 2 patches today. the 1st one adds the helper, the 2nd patch
fixes the usage of update_debugctlmsr().

Oleg.

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