libhugetlbfs/SOURCES/0009-tests-Add-utility-to-check-if-huge-pages-are-giganti.patch
2021-09-09 20:20:27 +00:00

60 lines
1.8 KiB
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From a4879cc4f88b560958950d9277ba0df487b145f4 Mon Sep 17 00:00:00 2001
Message-Id: <a4879cc4f88b560958950d9277ba0df487b145f4.1566225007.git.aquini@redhat.com>
In-Reply-To: <d42f467a923dfc09309acb7a83b42e3285fbd8f4.1566225007.git.aquini@redhat.com>
References: <d42f467a923dfc09309acb7a83b42e3285fbd8f4.1566225007.git.aquini@redhat.com>
From: Sandipan Das <sandipan@linux.ibm.com>
Date: Thu, 15 Aug 2019 13:08:36 +0530
Subject: [RHEL7 PATCH 09/31] tests: Add utility to check if huge pages are
gigantic
This adds a test utility to check if the currently selected
huge page size corresponds to that of a gigantic page.
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Eric B Munson <emunson@mgebm.net>
Signed-off-by: Rafael Aquini <aquini@redhat.com>
---
tests/hugetests.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/tests/hugetests.h b/tests/hugetests.h
index e3179e6..bc4e16a 100644
--- a/tests/hugetests.h
+++ b/tests/hugetests.h
@@ -22,6 +22,7 @@
#include <errno.h>
#include <string.h>
+#include <unistd.h>
#include "libhugetlbfs_privutils.h"
#include "libhugetlbfs_testprobes.h"
@@ -136,6 +137,24 @@ static inline long check_hugepagesize()
return __hpage_size;
}
+static inline void check_if_gigantic_page(void)
+{
+ long page_size, hpage_size, max_order;
+ FILE *fp;
+
+ page_size = sysconf(_SC_PAGESIZE);
+ hpage_size = gethugepagesize();
+ fp = popen("cat /proc/pagetypeinfo | "
+ "awk '/Free pages count per migrate type at order/ "
+ "{print $NF}'", "r");
+ if (!fp || fscanf(fp, "%lu", &max_order) < 0)
+ FAIL("Couldn't determine max page allocation order");
+
+ pclose(fp);
+ if (hpage_size > ((1 << max_order) * page_size))
+ CONFIG("Gigantic pages are not supported");
+}
+
int using_system_hpage_size(const char *mount);
/* WARNING: Racy -- use for test cases only! */
--
1.8.3.1