linux-kernel - Re: Crash while mapping memory in pagetable

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Date:	Fri, 13 Apr 2007 14:07:13 -0700
From:	Zachary Amsden <zach@...are.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Chris Wright <chrisw@...s-sol.org>, Andi Kleen <ak@...e.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linus Torvalds <torvalds@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Crash while mapping memory in pagetable_init() (Was: Re: .config)

H. Peter Anvin wrote:
>
> #ifdef CONFIG_X86_PAE
> PAGE_TABLE_SIZE = (2048+4)*4096
> #else
> PAGE_TABLE_SIZE = (1024+1)*4096
> #endif
> BOOTMEM_SIZE = 128*1024

/* ACPI and SMP trampoline allocate bootmem pages before paging_init */
#ifdef CONFIG_SMP
SMP_BOOTMEM_EARLY= 1
#else
SMP_BOOTMEM_EARLY= 0
#endif

#ifdef CONFIG_ACPI
ACPI_BOOTMEM_EARLY = 1
#else
ACPI_BOOTMEM_EARLY = 0
#endif

>
> INIT_MAP_BEYOND_END = BOOTMEM_SIZE + PAGE_TABLE_SIZE

+SMP_BOOTMEM_EARLY + ACPI_BOOTMEM_EARLY

Zach
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