linux/arch/x86_64
Andi Kleen ac71d12c99 [PATCH] x86_64: Avoid EBDA area in early boot allocator
Based on analysis&patch from Robert Hentosch

Observed on a Dell PE6850 with 16GB

The problem occurs very early on, when the kernel allocates space for the
temporary memory map called bootmap. The bootmap overlaps the EBDA region.
EBDA region is not historically reserved in the e820 mapping. When the
bootmap is freed it marks the EBDA region as usable.

If you notice in setup.c there is already code to work around the EBDA
in reserve_ebda_region(), this check however occurs after the bootmap
is allocated and doesn't prevent the bootmap from using this range.

AK: I redid the original patch. Thanks also to Jan Beulich for
spotting some mistakes.

Cc: Robert_Hentosch@dell.com
Cc: jbeulich@novell.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-08 09:34:56 -07:00
..
boot [PATCH] vesafb: Fix incorrect logo colors in x86_64 2006-04-11 06:18:54 -07:00
crypto [CRYPTO] aes: Fixed array boundary violation 2006-03-21 20:14:10 +11:00
ia32 [PATCH] x86_64: Add compat_sys_vmsplice and use it in x86-64 2006-05-01 18:17:43 -07:00
kernel [PATCH] x86_64: Avoid EBDA area in early boot allocator 2006-05-08 09:34:56 -07:00
lib [PATCH] x86_64: remove dead do_softirq_thunk 2006-03-25 09:10:53 -08:00
mm [PATCH] x86_64: sparsemem does not need node_mem_map 2006-04-22 09:19:52 -07:00
oprofile [PATCH] Move Kprobes and Oprofile to "Instrumentation Support" menu 2005-11-07 07:53:35 -08:00
pci [PATCH] x86_64: Fix embarassing typo in mmconfig bus check 2006-04-11 06:38:57 -07:00
defconfig [PATCH] x86_64: Update defconfig 2006-04-18 10:39:19 -07:00
Kconfig [PATCH] Configurable NODES_SHIFT 2006-04-11 06:18:39 -07:00
Kconfig.debug [PATCH] x86_64: Remove CONFIG_INIT_DEBUG 2006-02-04 16:43:13 -08:00
Makefile [PATCH] x86_64: fix CONFIG_REORDER 2006-04-09 11:53:53 -07:00