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x86: default corruption check to off, but put parameter default in Kconfig 

Default the low memory corruption check to off, but make the default setting of
the memory_corruption_check kernel parameter a config parameter.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2008-09-07 02:37:32 -07:00 committed by Ingo Molnar
parent 9f077871ce
commit c885df50f5
2 changed files with 20 additions and 2 deletions
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9
arch/x86/Kconfig
View File

@ -1061,7 +1061,6 @@ config HIGHPTE
config X86_CHECK_BIOS_CORRUPTION
bool "Check for low memory corruption"
default y
help
Periodically check for memory corruption in low memory, which
is suspected to be caused by BIOS. Even when enabled in the
@ -1082,6 +1081,14 @@ config X86_CHECK_BIOS_CORRUPTION
you can use memmap= to prevent the kernel from using that
memory.
config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
bool "Set the default setting of memory_corruption_check"
depends on X86_CHECK_BIOS_CORRUPTION
default y
help
Set whether the default state of memory_corruption_check is
on or off.
config MATH_EMULATION
bool
prompt "Math emulation" if X86_32

13
arch/x86/kernel/setup.c
View File

@ -587,7 +587,8 @@ struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
#define MAX_SCAN_AREAS 8
static int __read_mostly memory_corruption_check = 0;
static int __read_mostly memory_corruption_check = -1;
static unsigned __read_mostly corruption_check_size = 64*1024;
static unsigned __read_mostly corruption_check_period = 60; /* seconds */
@ -634,6 +635,16 @@ static void __init setup_bios_corruption_check(void)
{
u64 addr = PAGE_SIZE; /* assume first page is reserved anyway */
if (memory_corruption_check == -1) {
memory_corruption_check =
#ifdef CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
1
#else
0
#endif
;
}
if (corruption_check_size == 0)
memory_corruption_check = 0;