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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 config X86_CHECK_BIOS_CORRUPTION
bool "Check for low memory corruption" bool "Check for low memory corruption"
default y
help help
Periodically check for memory corruption in low memory, which Periodically check for memory corruption in low memory, which
is suspected to be caused by BIOS. Even when enabled in the 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 you can use memmap= to prevent the kernel from using that
memory. 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 config MATH_EMULATION
bool bool
prompt "Math emulation" if X86_32 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 #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
#define MAX_SCAN_AREAS 8 #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_size = 64*1024;
static unsigned __read_mostly corruption_check_period = 60; /* seconds */ 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 */ 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) if (corruption_check_size == 0)
memory_corruption_check = 0; memory_corruption_check = 0;