From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Tejun Heo <htejun@gmail.com>
Cc: Brian Gerst <brgerst@gmail.com>, Ingo Molnar <mingo@elte.hu>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Gerd Hoffmann <kraxel@redhat.com>
Subject: Re: unified percpu stuff
Date: Thu, 29 Jan 2009 02:43:14 -0800 [thread overview]
Message-ID: <49818842.5020004@goop.org> (raw)
In-Reply-To: <497E8AD4.7030702@gmail.com>
Tejun Heo wrote:
> The current tj-percpu[1] contains Brian's commit which consolidates
> load_gs_base() into switch_to_new_gdt(),
There's a bit of a bootstrap problem using switch_to_new_gdt() on the
boot CPU: it uses smp_processor_id, which ends up doing a
percpu_read(cpu_number), which naturally crashes because %gs isn't set
up yet. Perhaps switch_to_new_gdt() should take the cpu number as a
parameter (or at least a __switch_to_new_gdt variant which does).
J
next prev parent reply other threads:[~2009-01-29 10:43 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-27 1:12 unified percpu stuff Jeremy Fitzhardinge
2009-01-27 4:17 ` Tejun Heo
2009-01-29 10:43 ` Jeremy Fitzhardinge [this message]
2009-01-29 11:01 ` Tejun Heo
2009-01-29 13:43 ` [PATCH] x86: pass in cpu number to switch_to_new_gdt() Brian Gerst
2009-01-29 21:36 ` Jeremy Fitzhardinge
2009-01-29 21:36 ` [PATCH 1/2] x86: split loading percpu segments from loading gdt Jeremy Fitzhardinge
2009-01-29 21:36 ` [PATCH 2/2] xen: setup percpu data pointers Jeremy Fitzhardinge
2009-01-30 8:50 ` Tejun Heo
2009-01-30 8:50 ` [PATCH] x86: pass in cpu number to switch_to_new_gdt() Tejun Heo
2009-01-27 5:57 ` unified percpu stuff Brian Gerst
2009-01-27 7:24 ` Jeremy Fitzhardinge
2009-01-27 12:35 ` Brian Gerst
2009-01-27 17:50 ` Jeremy Fitzhardinge
2009-01-27 19:07 ` Brian Gerst
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