From: Kyle McMartin <kyle@mcmartin.ca>
To: Yoav Artzi <yoavar@checkpoint.com>
Cc: Adrian Bunk <bunk@kernel.org>, Jiri Slaby <jirislaby@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: PAGE_SIZE on 64bit and 32bit machines
Date: Mon, 12 Nov 2007 11:11:06 -0500 [thread overview]
Message-ID: <20071112161106.GB24243@fattire.cabal.ca> (raw)
In-Reply-To: <47387810.3060503@checkpoint.com>
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.
next prev parent reply other threads:[~2007-11-12 16:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-12 14:39 PAGE_SIZE on 64bit and 32bit machines Yoav Artzi
2007-11-12 15:14 ` Jiri Slaby
2007-11-12 15:32 ` Yoav Artzi
2007-11-12 15:39 ` Adrian Bunk
2007-11-12 15:58 ` Yoav Artzi
2007-11-12 16:02 ` Jiri Slaby
2007-11-12 16:11 ` Kyle McMartin [this message]
2007-11-12 16:22 ` Yoav Artzi
2007-11-12 17:13 ` Chris Snook
2007-11-13 12:10 ` Helge Hafting
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