diff options
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 50a4aa0255a..2ec8eb5a9cd 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -29,6 +29,7 @@ #include <linux/mmu_notifier.h> #include <linux/perf_event.h> #include <linux/audit.h> +#include <linux/khugepaged.h> #include <asm/uaccess.h> #include <asm/cacheflush.h> @@ -253,7 +254,15 @@ SYSCALL_DEFINE1(brk, unsigned long, brk) down_write(&mm->mmap_sem); #ifdef CONFIG_COMPAT_BRK - min_brk = mm->end_code; + /* + * CONFIG_COMPAT_BRK can still be overridden by setting + * randomize_va_space to 2, which will still cause mm->start_brk + * to be arbitrarily shifted + */ + if (mm->start_brk > PAGE_ALIGN(mm->end_data)) + min_brk = mm->start_brk; + else + min_brk = mm->end_data; #else min_brk = mm->start_brk; #endif @@ -588,6 +597,8 @@ again: remove_next = 1 + (end > next->vm_end); } } + vma_adjust_trans_huge(vma, start, end, adjust_next); + /* * When changing only vma->vm_end, we don't really need anon_vma * lock. This is a fairly rare case by itself, but the anon_vma @@ -815,6 +826,7 @@ struct vm_area_struct *vma_merge(struct mm_struct *mm, end, prev->vm_pgoff, NULL); if (err) return NULL; + khugepaged_enter_vma_merge(prev); return prev; } @@ -833,6 +845,7 @@ struct vm_area_struct *vma_merge(struct mm_struct *mm, next->vm_pgoff - pglen, NULL); if (err) return NULL; + khugepaged_enter_vma_merge(area); return area; } @@ -1761,6 +1774,7 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address) } } vma_unlock_anon_vma(vma); + khugepaged_enter_vma_merge(vma); return error; } #endif /* CONFIG_STACK_GROWSUP || CONFIG_IA64 */ @@ -1808,6 +1822,7 @@ static int expand_downwards(struct vm_area_struct *vma, } } vma_unlock_anon_vma(vma); + khugepaged_enter_vma_merge(vma); return error; } |