x86: early memtest to find bad ram

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do simple memtest after init_memory_mapping

use find_e820_area_size to find all ram range that is not reserved.

and do some simple bits test to find some bad ram.

if find some bad ram, use reserve_early to exclude that range.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Yinghai Lu 2008-03-20 23:58:33 -07:00 • committed by Ingo Molnar

parent a5ae1c372d

commit 272b9cad6e

3 changed files with 177 additions and 2 deletions

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70

arch/x86/kernel/e820_64.c

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106

arch/x86/mm/init_64.c

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3

include/asm-x86/e820_64.h

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