linux-kernel - Re: [PATCH v2] x86, hotplug: fix llc shared map unreleased during cpu hotplug

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Message-ID: <20140729083359.GA11179@pd.tnic>
Date:	Tue, 29 Jul 2014 10:33:59 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Wanpeng Li <wanpeng.li@...ux.intel.com>
Cc:	hpa@...or.com, Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
	David Rientjes <rientjes@...gle.com>,
	Prarit Bhargava <prarit@...hat.com>,
	Steven Rostedt <srostedt@...hat.com>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Toshi Kani <toshi.kani@...com>, linux-kernel@...r.kernel.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"Zhang, Yang Z" <yang.z.zhang@...el.com>,
	Yong Wang <yong.y.wang@...ux.intel.com>
Subject: Re: [PATCH v2] x86, hotplug: fix llc shared map unreleased during
 cpu hotplug

On Tue, Jul 29, 2014 at 04:31:30PM +0900, Yasuaki Ishimatsu wrote:
> >>I posted a latest patch as follows:
> >>https://lkml.org/lkml/2014/7/22/1018
> >>
> >>Could you confirm the patch fixes your issue?
> >
> >Sorry for the late, there is still call trace w/ your patch applied. The
> >call trace is in attachment.
> 
> Thank you for reporting the result. As Borislav said, your v2 patch
> is necessary for fixing your issue.

..

> >>>Signed-off-by: Wanpeng Li <wanpeng.li@...ux.intel.com>
> 
> Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>

Ok, Wanpeng, please send a cleaner version of your patch with a
simplified backtrace in it - the addresses will make no sense anyway so
you can do this:

Call Trace:
load_balance
? _raw_spin_unlock_irqrestore
idle_balance
...

so that we can still see how it happens.

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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