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Date: Wed, 1 Aug 2012 16:47:43 +0200
From: Oleg Nesterov <oleg@redhat.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Roland McGrath <roland@hack.frob.com>, "H. Peter Anvin" <hpa@zytor.com>,
        linux-kernel@vger.kernel.org, ananth@in.ibm.com,
        a.p.zijlstra@chello.nl, mingo@redhat.com, srikar@linux.vnet.ibm.com
Subject: Re: Q: user_enable_single_step() && update_debugctlmsr()
Message-ID: <20120801144743.GA8497@redhat.com>
References: <20120731175108.GC14576@redhat.com> <50183273.9070304@linutronix.de> <20120801122616.GA32705@redhat.com> <20120801130118.GA2386@redhat.com> <50192FF5.1060208@linutronix.de> <20120801134652.GA4707@redhat.com> <50193528.3070503@linutronix.de> <20120801140121.GA5333@redhat.com> <50193B5C.90404@linutronix.de> <20120801143132.GA7550@redhat.com>
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On 08/01, Oleg Nesterov wrote:
>
> GDB does ptrace(PTRACE_SINGLEBLOCK, T). This sets X->TIF_BLOCKSTEP.
                                                   ^^^
this sets T->TIF_BLOCKSTEP, I meant

Oleg.