Date: Mon, 14 Apr 2014 11:56:00 +0200
From: Igor Mammedov <imammedo@redhat.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com,
        hpa@zytor.com, x86@kernel.org, bp@suse.de,
        paul.gortmaker@windriver.com, JBeulich@suse.com, prarit@redhat.com,
        drjones@redhat.com, toshi.kani@hp.com, riel@redhat.com,
        gong.chen@linux.intel.com, andi@firstfloor.org, lenb@kernel.org,
        rjw@rjwysocki.net, linux-acpi@vger.kernel.org
Subject: Re: [PATCH v3 3/5] x86: fix list corruption on CPU hotplug
Message-ID: <20140414115600.0d5dbbb5@thinkpad>
In-Reply-To: <20140414091954.GB19771@gmail.com>
References: <1397150061-29735-1-git-send-email-imammedo@redhat.com>
	<1397150061-29735-4-git-send-email-imammedo@redhat.com>
	<20140414091954.GB19771@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org

On Mon, 14 Apr 2014 11:19:54 +0200
Ingo Molnar <mingo@kernel.org> wrote:

> 
> * Igor Mammedov <imammedo@redhat.com> wrote:
> 
> > currently if AP wake up is failed, master CPU marks AP as not present
> > in do_boot_cpu() by calling set_cpu_present(cpu, false).
> > That leads to following list corruption on the next physical CPU
> > hotplug:
> 
> Shouldn't this fix precede the main change to the smp bootup logic?
> 
> Can this bug trigger with current upstream kernels?
That's not impossible, tests showed that with current kernel there will
be other problems due wild AP running around.

I'll reorder patch anyway.

> 
> Thanks,
> 
> 	Ingo


-- 
Regards,
  Igor
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/