linux-kernel - Re: [PATCH 1/3] xen: setup percpu data pointers

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Message-ID: <498A8738.9050200@gmail.com>
Date:	Thu, 05 Feb 2009 15:29:12 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>
Subject: Re: [PATCH 1/3] xen: setup percpu data pointers

Jeremy Fitzhardinge wrote:
> We need to access percpu data fairly early, so set up the percpu
> registers as soon as possible.  We only need to load the appropriate
> segment register.  We already have a GDT, but its hard to change it
> early because we need to manipulate the pagetable to do so, and that
> hasn't been set up yet.
> 
> Also, set the kernel stack when bringing up secondary CPUs.  If we
> don't they all end up sharing the same stack...
> 
> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
> ---
> arch/x86/xen/enlighten.c |   16 ++++++++++++++++
> arch/x86/xen/smp.c       |    7 ++++++-
> arch/x86/xen/xen-ops.h   |    2 ++
> 3 files changed, 24 insertions(+), 1 deletion(-)

Applied 1-3 to #tj-percpu with trivial modification on #2 (will reply
to the message).

Thanks.

-- 
tejun
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