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authorHugh Dickins <hugh@veritas.com>2008-09-07 01:51:33 -0700
committerIngo Molnar <mingo@elte.hu>2008-09-07 17:40:00 +0200
commitbb577f980ef35e2b0d00aeed566724e5032aa5eb (patch)
tree2c9016f7811fb3ea80bbbc8d9856c217110695b7 /arch
parent5394f80f92642c61fc2a95385be85f2fdcfb5adb (diff)
x86: add periodic corruption check
Perodically check for corruption in low phusical memory. Don't bother checking at fault time, since it won't show anything useful. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/setup.c17
-rw-r--r--arch/x86/mm/fault.c2
-rw-r--r--arch/x86/mm/init_32.c2
-rw-r--r--arch/x86/mm/init_64.c2
4 files changed, 21 insertions, 2 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index ee89ebc5aab..c239b378097 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -623,6 +623,7 @@ static void __init setup_bios_corruption_check(void)
}
static int __read_mostly bios_corruption_check = 1;
+static struct timer_list periodic_check_timer;
void check_for_bios_corruption(void)
{
@@ -650,6 +651,22 @@ void check_for_bios_corruption(void)
dump_stack();
}
+static void periodic_check_for_corruption(unsigned long data)
+{
+ check_for_bios_corruption();
+ mod_timer(&periodic_check_timer, jiffies + 60*HZ);
+}
+
+void start_periodic_check_for_corruption(void)
+{
+ if (!bios_corruption_check)
+ return;
+
+ init_timer(&periodic_check_timer);
+ periodic_check_timer.function = &periodic_check_for_corruption;
+ periodic_check_for_corruption(0);
+}
+
static int set_bios_corruption_check(char *arg)
{
char *end;
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 5140bdf0302..455f3fe67b4 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -848,8 +848,6 @@ no_context:
* Oops. The kernel tried to access some bad page. We'll have to
* terminate things with extreme prejudice.
*/
- check_for_bios_corruption();
-
#ifdef CONFIG_X86_32
bust_spinlocks(1);
#else
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index d37f29376b0..657a16ad61b 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -907,6 +907,8 @@ void __init mem_init(void)
int codesize, reservedpages, datasize, initsize;
int tmp;
+ start_periodic_check_for_corruption();
+
#ifdef CONFIG_FLATMEM
BUG_ON(!mem_map);
#endif
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index d3746efb060..f4db5276fa2 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -769,6 +769,8 @@ void __init mem_init(void)
{
long codesize, reservedpages, datasize, initsize;
+ start_periodic_check_for_corruption();
+
pci_iommu_alloc();
/* clear_bss() already clear the empty_zero_page */