Date: Tue, 24 Feb 2015 22:19:37 +0100
From: Borislav Petkov <bp@alien8.de>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
        Naoya Horiguchi <nao.horiguchi@gmail.com>,
        Vivek Goyal <vgoyal@redhat.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Junichi Nomura <j-nomura@ce.jp.nec.com>,
        Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Subject: Re: [PATCH 1/2] x86: mce: kdump: use under_crashdumping to turn off
 MCE in all CPUs together
Message-ID: <20150224211937.GP3420@pd.tnic>
References: <20150223092739.GA22757@pd.tnic>
 <54EB24BE.5050006@gmail.com>
 <20150223135842.GA22753@pd.tnic>
 <54EB4A17.6020800@gmail.com>
 <20150223170653.GA16699@pd.tnic>
 <20150224081517.GB2918@hori1.linux.bs1.fc.nec.co.jp>
 <20150224095616.GB3420@pd.tnic>
 <3908561D78D1C84285E8C5FCA982C28F329EB977@ORSMSX114.amr.corp.intel.com>
 <20150224184033.GL3420@pd.tnic>
 <3908561D78D1C84285E8C5FCA982C28F329EBC73@ORSMSX114.amr.corp.intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F329EBC73@ORSMSX114.amr.corp.intel.com>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 697
Lines: 19

On Tue, Feb 24, 2015 at 06:47:23PM +0000, Luck, Tony wrote:
> since offline cpus will still show up to rendezvous ... perhaps
> "num_present_cpus()" is the right number??

Provided nmi_shootdown_cpus() code path clears offlined CPUs from
cpumasks so that num_present_cpus() or any other for that matter returns
the correct number, but I don't see it upon a quick grep...

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--
--
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/