hugetlb_overcommit_handler 21 include/linux/hugetlb.h int hugetlb_overcommit_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); hugetlb_overcommit_handler 980 kernel/sysctl.c .proc_handler = &hugetlb_overcommit_handler,