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Date: Wed, 25 Jul 2012 08:40:37 +0800
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From: Paul Ambrose <ambrosehua@gmail.com>
To: Konstantin Belousov <kostikbel@gmail.com>
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Cc: Richard Yao <ryao@gentoo.org>, "hackers@FreeBSD.org" <hackers@freebsd.org>
Subject: Re: Kernel thread stack size
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#define PAGE_SHIFT 12
#define PAGE_SIZE  (1<<PAGE_SHIFT)

#define KSTACK_PAGES 2
#define KSTACK_GUARD_PAGES 2

I had a MIPS machine (Loongson 3A) with page size 16KB( could be 4KB, but
had to handle cache alias in OS), IMHO,  define KSTACK_PAGE to 1 is enough,
 what is your opinion?


2012/7/23 Konstantin Belousov <kostikbel@gmail.com>

> On Mon, Jul 23, 2012 at 02:54:30AM -0400, Richard Yao wrote:
> > What is the default kernel thread stack size on FreeBSD? I am
> > particularly interested in knowing about i386 and amd64, but knowing
> > this for other architectures (such as MIPS) would also be useful.
> >
>
> Look for the KSTACK_PAGES symbol defined in sys/<arch>/include/param.h.
> It defines _default_ number of pages allocated for kernel stack of
> new thread.
>
> We have 4 pages for amd64, and 2 pages for i386, AFAIR. Look up the MIPS
> yourself.
>