linux-kernel - Re: [PATCH 03/17] x86-64: Convert irqstacks to per-cpu

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Date:	Sun, 18 Jan 2009 13:58:01 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Brian Gerst <brgerst@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/17] x86-64: Convert irqstacks to per-cpu

Hello,

Brian Gerst wrote:
> @@ -211,15 +211,13 @@ ENTRY(secondary_startup_64)
>  	 * data area.  Computing this requires two symbols - __per_cpu_load
>  	 * and per_cpu__gdt_page.  As linker can't do no such relocation, do
>  	 * it by hand.  As early_gdt_descr is manipulated by C code for
> -	 * secondary CPUs, this should be done only once for the boot CPU
> -	 * when early_gdt_descr_base contains zero.
> +	 * secondary CPUs, this should be done only once for the boot CPU.
>  	 */

It would probably be nice to mention that it's calculating per cpu
load addresses for early access.  The comment only refers to gdt_page
which is a bit misleading as it now also adjusts irqstackptr.

Also, as pda field name, irqstackptr might be fine but wouldn't it be
better to rename it to at least irq_stack_ptr as this change requires
touching every users anyway?

Thanks.

-- 
tejun
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