[v2,1/2] selftests/mm: export get_free_hugepages()
Commit Message
get_free_hugepages() is helpful for other hugepage tests. Export it to
the common file (vm_util.c) to be reused.
Signed-off-by: Breno Leitao <leitao@debian.org>
---
tools/testing/selftests/mm/hugetlb-madvise.c | 19 -------------------
tools/testing/selftests/mm/vm_util.c | 19 +++++++++++++++++++
tools/testing/selftests/mm/vm_util.h | 1 +
3 files changed, 20 insertions(+), 19 deletions(-)
Comments
On Thu, 2023-10-05 at 09:39 -0700, Breno Leitao wrote:
> get_free_hugepages() is helpful for other hugepage tests. Export it
> to
> the common file (vm_util.c) to be reused.
>
> Signed-off-by: Breno Leitao <leitao@debian.org>
>
Reviewed-by: Rik van Riel <riel@surriel.com>
@@ -36,25 +36,6 @@
unsigned long huge_page_size;
unsigned long base_page_size;
-unsigned long get_free_hugepages(void)
-{
- unsigned long fhp = 0;
- char *line = NULL;
- size_t linelen = 0;
- FILE *f = fopen("/proc/meminfo", "r");
-
- if (!f)
- return fhp;
- while (getline(&line, &linelen, f) > 0) {
- if (sscanf(line, "HugePages_Free: %lu", &fhp) == 1)
- break;
- }
-
- free(line);
- fclose(f);
- return fhp;
-}
-
void write_fault_pages(void *addr, unsigned long nr_pages)
{
unsigned long i;
@@ -269,3 +269,22 @@ int uffd_unregister(int uffd, void *addr, uint64_t len)
return ret;
}
+
+unsigned long get_free_hugepages(void)
+{
+ unsigned long fhp = 0;
+ char *line = NULL;
+ size_t linelen = 0;
+ FILE *f = fopen("/proc/meminfo", "r");
+
+ if (!f)
+ return fhp;
+ while (getline(&line, &linelen, f) > 0) {
+ if (sscanf(line, "HugePages_Free: %lu", &fhp) == 1)
+ break;
+ }
+
+ free(line);
+ fclose(f);
+ return fhp;
+}
@@ -51,6 +51,7 @@ int uffd_register(int uffd, void *addr, uint64_t len,
int uffd_unregister(int uffd, void *addr, uint64_t len);
int uffd_register_with_ioctls(int uffd, void *addr, uint64_t len,
bool miss, bool wp, bool minor, uint64_t *ioctls);
+unsigned long get_free_hugepages(void);
/*
* On ppc64 this will only work with radix 2M hugepage size