diff options
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index adefc1131f27..552c8d8e77ad 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -33,6 +33,7 @@ #include <linux/cpu.h> #include <linux/cgroup.h> #include <linux/security.h> +#include <linux/hugetlb.h> #include <linux/swap.h> #include <linux/syscalls.h> #include <linux/jiffies.h> @@ -307,6 +308,14 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm) } /* + * Clear hugetlb-related page reserves for children. This only + * affects MAP_PRIVATE mappings. Faults generated by the child + * are not guaranteed to succeed, even if read-only + */ + if (is_vm_hugetlb_page(tmp)) + reset_vma_resv_huge_pages(tmp); + + /* * Link in the new vma and copy the page table entries. */ *pprev = tmp; |
