linux-kernel - Re: [PATCH 1/2] x86-32: Fix crashes with CPU hotplug on AMD machines

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Message-ID: <20100813123543.GC9046@aftab>
Date:	Fri, 13 Aug 2010 14:35:43 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Joerg Roedel <joro@...tes.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"Roedel, Joerg" <Joerg.Roedel@....com>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"Herrmann3, Andreas" <Andreas.Herrmann3@....com>,
	"Seidel, Conny" <Conny.Seidel@....com>,
	"Sarathy, Bhavna" <Bhavna.Sarathy@....com>,
	"greg@...ah.com" <greg@...ah.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] x86-32: Fix crashes with CPU hotplug on AMD
 machines

From: Joerg Roedel <joro@...tes.org>
Date: Thu, Aug 12, 2010 at 03:04:14PM -0400

> On Thu, Aug 12, 2010 at 12:01:27PM -0700, H. Peter Anvin wrote:
> > On 08/12/2010 10:06 AM, Joerg Roedel wrote:
> 
> > > The synchronization problem might be real. The cpu_init function uses
> > > per-cpu variables which might not be present in the early synced
> > > tramponline page table (iirc). The change to swapper_pg_dir and the
> > > global tlb flush should probably be moved to the very beginning of the
> > > start_secondary function.
> > > 
> > 
> > Are you going to submit an updated patch, then?
> 
> Yes, I will send it next week when I am back in office and gave it some
> testing.

currently testing...

-- 
Regards/Gruss,
Boris.

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