#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
-
-#define MAP_LENGTH (2UL * 1024 * 1024)
-
-#define PAGE_SIZE 4096
+#include "vm_util.h"
#define PAGE_COMPOUND_HEAD (1UL << 15)
#define PAGE_COMPOUND_TAIL (1UL << 16)
#define MAP_FLAGS (MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB)
#endif
+static size_t pagesize;
+static size_t maplength;
+
static void write_bytes(char *addr, size_t length)
{
unsigned long i;
if (fd < 0)
return -1UL;
- lseek(fd, (unsigned long)addr / PAGE_SIZE * sizeof(pagemap), SEEK_SET);
+ lseek(fd, (unsigned long)addr / pagesize * sizeof(pagemap), SEEK_SET);
read(fd, &pagemap, sizeof(pagemap));
close(fd);
* this also verifies kernel has correctly set the fake page_head to tail
* while hugetlb_free_vmemmap is enabled.
*/
- for (i = 1; i < MAP_LENGTH / PAGE_SIZE; i++) {
+ for (i = 1; i < maplength / pagesize; i++) {
read(fd, &pageflags, sizeof(pageflags));
if ((pageflags & TAIL_PAGE_FLAGS) != TAIL_PAGE_FLAGS ||
(pageflags & HEAD_PAGE_FLAGS) == HEAD_PAGE_FLAGS) {
void *addr;
unsigned long pfn;
- addr = mmap(MAP_ADDR, MAP_LENGTH, PROT_READ | PROT_WRITE, MAP_FLAGS, -1, 0);
+ pagesize = psize();
+ maplength = default_huge_page_size();
+ if (!maplength) {
+ printf("Unable to determine huge page size\n");
+ exit(1);
+ }
+
+ addr = mmap(MAP_ADDR, maplength, PROT_READ | PROT_WRITE, MAP_FLAGS, -1, 0);
if (addr == MAP_FAILED) {
perror("mmap");
exit(1);
}
/* Trigger allocation of HugeTLB page. */
- write_bytes(addr, MAP_LENGTH);
+ write_bytes(addr, maplength);
pfn = virt_to_pfn(addr);
if (pfn == -1UL) {
- munmap(addr, MAP_LENGTH);
+ munmap(addr, maplength);
perror("virt_to_pfn");
exit(1);
}
printf("Returned address is %p whose pfn is %lx\n", addr, pfn);
if (check_page_flags(pfn) < 0) {
- munmap(addr, MAP_LENGTH);
+ munmap(addr, maplength);
perror("check_page_flags");
exit(1);
}
/* munmap() length of MAP_HUGETLB memory must be hugepage aligned */
- if (munmap(addr, MAP_LENGTH)) {
+ if (munmap(addr, maplength)) {
perror("munmap");
exit(1);
}