linux-kernel - [patch]VMSPLIT_2G conflicts with PAE

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Message-Id: <1164944925.1918.5.camel@sli10-conroe.sh.intel.com>
Date:	Fri, 01 Dec 2006 11:48:45 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...l.org>
Subject: [patch]VMSPLIT_2G conflicts with PAE

PAGE_OFFSET is 0x78000000 with VMSPLIT_2G, this address is in the middle
of the second pgd entry with pae enabled. This breaks assumptions
(address is aligned to pgd entry's address) in a lot of places like
pagetable_init. Fixing the assumptions is hard (eg, low mapping). SO I
just changed the address to 0x80000000.

Signed-off-by: Shaohua Li <shaohua.li@...el.com>

diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index 8ff1c6f..fddfb26 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -532,7 +532,7 @@ endchoice
 config PAGE_OFFSET
 	hex
 	default 0xB0000000 if VMSPLIT_3G_OPT
-	default 0x78000000 if VMSPLIT_2G
+	default 0x80000000 if VMSPLIT_2G
 	default 0x40000000 if VMSPLIT_1G
 	default 0xC0000000
 
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