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Commit 9e730237 authored by Vegard Nossum's avatar Vegard Nossum
Browse files

kmemcheck: don't track page tables 



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: default avatarVegard Nossum <vegard.nossum@gmail.com>
parent 33f65df7

arch/x86/mm/init_64.c

+2 −2
Original line number Diff line number Diff line
@@ -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;

arch/x86/mm/pageattr.c

+1 −1
Original line number Diff line number Diff line
@@ -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)

arch/x86/mm/pgtable.c

+7 −5
Original line number Diff line number Diff line
@@ -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;