diff mbox series

[1/2] Add tst_get_hugepage_size() to LTP library

Message ID 20200619162922.20465-1-mdoucha@suse.cz
State Superseded
Headers show
Series [1/2] Add tst_get_hugepage_size() to LTP library | expand

Commit Message

Martin Doucha June 19, 2020, 4:29 p.m. UTC 
Signed-off-by: Martin Doucha <mdoucha@suse.cz>
---

Simple helper function for the Hugepage CoW test.

 include/tst_hugepage.h | 5 +++++
 lib/tst_hugepage.c     | 9 +++++++++
 2 files changed, 14 insertions(+)
diff mbox series

Patch

diff --git a/include/tst_hugepage.h b/include/tst_hugepage.h
index 60c03c5c5..e08a2daa2 100644
--- a/include/tst_hugepage.h
+++ b/include/tst_hugepage.h
@@ -12,6 +12,11 @@ 
 extern char *nr_opt; /* -s num   Set the number of the been allocated hugepages */
 extern char *Hopt;   /* -H /..   Location of hugetlbfs, i.e.  -H /var/hugetlbfs */
 
+/*
+ * Get the default hugepage size. Returns 0 if hugepages are not supported.
+ */
+size_t tst_get_hugepage_size(void);
+
 /*
  * Try the best to request a specified number of huge pages from system,
  * it will store the reserved hpage number in tst_hugepages.
diff --git a/lib/tst_hugepage.c b/lib/tst_hugepage.c
index f2bf5d20e..3a8dcca90 100644
--- a/lib/tst_hugepage.c
+++ b/lib/tst_hugepage.c
@@ -12,6 +12,15 @@  unsigned long tst_hugepages;
 char *nr_opt;
 char *Hopt;
 
+size_t tst_get_hugepage_size(void)
+{
+	if (access(PATH_HUGEPAGES, F_OK)) {
+		return 0;
+	}
+
+	return SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
+}
+
 unsigned long tst_request_hugepages(unsigned long hpages)
 {
 	unsigned long val, max_hpages;