Re: PAGE_SIZE on 64bit and 32bit machines

[Yoav Artzi <yoavar@checkpoint.com>]

I see. Thanks, guys.


-------- Original Message  --------

Subject: Re: PAGE_SIZE on 64bit and 32bit machines
From: Kyle McMartin <kyle@mcmartin.ca>
To: Yoav Artzi <yoavar@checkpoint.com>
Date: Monday, November 12, 2007 6:11:06 PM

> On Mon, Nov 12, 2007 at 05:58:08PM +0200, Yoav Artzi wrote:
>   
> > Looking at the source, I see:
> >
> > #ifdef CONFIG_4KSTACKS
> > #define THREAD_SIZE            (4096)
> > #else
> > #define THREAD_SIZE        (8192)
> > #endif
> >
> >
> > So if I configure the option CONFIG_4KSTACK, I will get a 4KB kernel 
> > stack. Am I missing something here?
> >
> >     
>
> This is only on i386 (32-bit x86...)[1] On x86-64, we have 8K kernel
> stacks (THREAD_ORDER 1), and 16K irqstacks (IRQSTACK_ORDER 2).
>
> The relevant defines are found in <asm-x86/page_64.h> for x86_64, and
> <asm-x86/thread_info_32.h> for i386.
>
> Cheers,
> 	Kyle
>
> 1. That is, stack size is only configurable on 32bit.
>
> Scanned by Check Point VPN-1 UTM NGX R65 with Messaging Security
>
>   

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