diff options
Diffstat (limited to 'mm/mprotect.c')
| -rw-r--r-- | mm/mprotect.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c index 41e0292..f0b087d 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -37,14 +37,15 @@ static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, unsigned long end, pgprot_t newprot, - int dirty_accountable, int prot_numa, bool *ret_all_same_node) + int dirty_accountable, int prot_numa, bool *ret_all_same_nidpid) { struct mm_struct *mm = vma->vm_mm; pte_t *pte, oldpte; spinlock_t *ptl; unsigned long pages = 0; - bool all_same_node = true; + bool all_same_nidpid = true; int last_nid = -1; + int last_pid = -1; pte = pte_offset_map_lock(mm, pmd, addr, &ptl); arch_enter_lazy_mmu_mode(); @@ -63,11 +64,18 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, page = vm_normal_page(vma, addr, oldpte); if (page) { - int this_nid = page_to_nid(page); + int nidpid = page_nidpid_last(page); + int this_nid = nidpid_to_nid(nidpid); + int this_pid = nidpid_to_pid(nidpid); + if (last_nid == -1) last_nid = this_nid; - if (last_nid != this_nid) - all_same_node = false; + if (last_pid == -1) + last_pid = this_pid; + if (last_nid != this_nid || + last_pid != this_pid) { + all_same_nidpid = false; + } if (!pte_numa(oldpte)) { ptent = pte_mknuma(ptent); @@ -107,7 +115,7 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd, arch_leave_lazy_mmu_mode(); pte_unmap_unlock(pte - 1, ptl); - *ret_all_same_node = all_same_node; + *ret_all_same_nidpid = all_same_nidpid; return pages; } @@ -134,7 +142,7 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, pmd_t *pmd; unsigned long next; unsigned long pages = 0; - bool all_same_node; + bool all_same_nidpid; pmd = pmd_offset(pud, addr); do { @@ -158,7 +166,7 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, if (pmd_none_or_clear_bad(pmd)) continue; pages += change_pte_range(vma, pmd, addr, next, newprot, - dirty_accountable, prot_numa, &all_same_node); + dirty_accountable, prot_numa, &all_same_nidpid); /* * If we are changing protections for NUMA hinting faults then @@ -166,7 +174,7 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma, * node. This allows a regular PMD to be handled as one fault * and effectively batches the taking of the PTL */ - if (prot_numa && all_same_node) + if (prot_numa && all_same_nidpid) change_pmd_protnuma(vma->vm_mm, addr, pmd); } while (pmd++, addr = next, addr != end); |
