From: "H. Peter Anvin" <hpa@zytor.com>
To: yanmin_zhang@linux.intel.com
Cc: mingo@redhat.com, tglx@linutronix.de, linx.z.chen@intel.com,
linux-kernel@vger.kernel.org
Subject: Re: [Fwd: [PATCH] x86/smp: Fix cpuN startup panic]
Date: Thu, 09 Aug 2012 20:35:49 -0700 [thread overview]
Message-ID: <50248195.9080401@zytor.com> (raw)
In-Reply-To: <1344558907.19233.3.camel@ymzhang.sh.intel.com>
On 08/09/2012 05:35 PM, Yanmin Zhang wrote:
> Peter,
>
> What's your opinion about the patch? We hit it when enabling Medfield Android mobile.
> This patch would put AP to a loop.
>
> Another method to fix it is just to enlarge the wait time, for example, from 2HZ to 10HZ.
>
Hmm... and I presume running with preemption disabled doesn't work for
hotplug (not that this is a hotplug situation)...
2 seconds is a *long* time, but I guess there isn't really nay harm in
making it 10 seconds in the sense that the system is basically dead at
that point...
tglx - you have been looking at the CPU startup lately, any opinions?
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
prev parent reply other threads:[~2012-08-10 3:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-10 0:35 [Fwd: [PATCH] x86/smp: Fix cpuN startup panic] Yanmin Zhang
2012-08-10 3:35 ` H. Peter Anvin [this message]
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