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kmemcheck: don't track page tables

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As these are allocated using the page allocator, we need to pass
__GFP_NOTRACK before we add page allocator support to kmemcheck.

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
This commit is contained in:
Vegard Nossum 2009-02-22 11:28:25 +01:00
parent 33f65df7ed
commit 9e730237c2
3 changed files with 10 additions and 8 deletions
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4
arch/x86/mm/init_64.c
View file

@ -104,7 +104,7 @@ static __ref void *spp_getpage(void)
void *ptr;
if (after_bootmem)
ptr = (void *) get_zeroed_page(GFP_ATOMIC);
ptr = (void *) get_zeroed_page(GFP_ATOMIC | __GFP_NOTRACK);
else
ptr = alloc_bootmem_pages(PAGE_SIZE);
@ -281,7 +281,7 @@ static __ref void *alloc_low_page(unsigned long *phys)
void *adr;
if (after_bootmem) {
adr = (void *)get_zeroed_page(GFP_ATOMIC);
adr = (void *)get_zeroed_page(GFP_ATOMIC | __GFP_NOTRACK);
*phys = __pa(adr);
return adr;

2
arch/x86/mm/pageattr.c
View file

@ -470,7 +470,7 @@ static int split_large_page(pte_t *kpte, unsigned long address)
if (!debug_pagealloc)
spin_unlock(&cpa_lock);
base = alloc_pages(GFP_KERNEL, 0);
base = alloc_pages(GFP_KERNEL | __GFP_NOTRACK, 0);
if (!debug_pagealloc)
spin_lock(&cpa_lock);
if (!base)

12
arch/x86/mm/pgtable.c
View file

@ -4,9 +4,11 @@
#include <asm/tlb.h>
#include <asm/fixmap.h>
#define PGALLOC_GFP GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO
pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
return (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
return (pte_t *)__get_free_page(PGALLOC_GFP);
}
pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
@ -14,9 +16,9 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
struct page *pte;
#ifdef CONFIG_HIGHPTE
pte = alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT|__GFP_ZERO, 0);
pte = alloc_pages(PGALLOC_GFP | __GFP_HIGHMEM, 0);
#else
pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
pte = alloc_pages(PGALLOC_GFP, 0);
#endif
if (pte)
pgtable_page_ctor(pte);
@ -161,7 +163,7 @@ static int preallocate_pmds(pmd_t *pmds[])
bool failed = false;
for(i = 0; i < PREALLOCATED_PMDS; i++) {
pmd_t *pmd = (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
pmd_t *pmd = (pmd_t *)__get_free_page(PGALLOC_GFP);
if (pmd == NULL)
failed = true;
pmds[i] = pmd;
@ -228,7 +230,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
pmd_t *pmds[PREALLOCATED_PMDS];
unsigned long flags;
pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
pgd = (pgd_t *)__get_free_page(PGALLOC_GFP);
if (pgd == NULL)
goto out;