diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/mm/tlb.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index dff6ddebc45f..ae584d09e8b0 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -164,8 +164,9 @@ unsigned long tlb_single_page_flush_ceiling = 1; void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, unsigned long end, unsigned long vmflag) { - int need_flush_others_all = 1; unsigned long addr; + /* do a global flush by default */ + unsigned long base_pages_to_flush = TLB_FLUSH_ALL; preempt_disable(); if (current->active_mm != mm) @@ -176,16 +177,14 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, goto out; } - if (end == TLB_FLUSH_ALL || vmflag & VM_HUGETLB) { - local_flush_tlb(); - goto out; - } + if ((end != TLB_FLUSH_ALL) && !(vmflag & VM_HUGETLB)) + base_pages_to_flush = (end - start) >> PAGE_SHIFT; - if ((end - start) > tlb_single_page_flush_ceiling * PAGE_SIZE) { + if (base_pages_to_flush > tlb_single_page_flush_ceiling) { + base_pages_to_flush = TLB_FLUSH_ALL; count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL); local_flush_tlb(); } else { - need_flush_others_all = 0; /* flush range by one by one 'invlpg' */ for (addr = start; addr < end; addr += PAGE_SIZE) { count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ONE); @@ -193,7 +192,7 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start, } } out: - if (need_flush_others_all) { + if (base_pages_to_flush == TLB_FLUSH_ALL) { start = 0UL; end = TLB_FLUSH_ALL; } |