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* [LTP] [RFC] [PATCH] move_pages12: Allocate and free hugepages prior the test
@ 2017-05-09 14:04 Cyril Hrubis
  2017-05-10  8:56 ` Jan Stancek
  0 siblings, 1 reply; 11+ messages in thread
From: Cyril Hrubis @ 2017-05-09 14:04 UTC (permalink / raw)
  To: ltp

This commit adds code into the test setup to mmap(), mbind() and fault
hugepages on both testing nodes prior to the test run in order to make sure
that there is enough continous space for the move_pages() syscall to move huge
pages back and forth.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
---
 .../kernel/syscalls/move_pages/move_pages12.c      | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/testcases/kernel/syscalls/move_pages/move_pages12.c b/testcases/kernel/syscalls/move_pages/move_pages12.c
index de00346..765ea7e 100644
--- a/testcases/kernel/syscalls/move_pages/move_pages12.c
+++ b/testcases/kernel/syscalls/move_pages/move_pages12.c
@@ -128,6 +128,45 @@ static void do_test(void)
 	}
 }
 
+static void alloc_free_huge_on_node(unsigned int node, size_t size)
+{
+	char *mem;
+	long ret;
+	struct bitmask *bm;
+
+	tst_res(TINFO, "Allocating and freeing %zu hugepages on node %u",
+		size / hpsz, node);
+
+	mem = mmap(NULL, size, PROT_READ | PROT_WRITE,
+		   MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0);
+	if (mem == MAP_FAILED) {
+		if (errno == ENOMEM)
+			tst_brk(TCONF, "Cannot allocate huge pages");
+
+		tst_brk(TBROK | TERRNO, "mmap(..., MAP_HUGETLB, ...) failed");
+	}
+
+	bm = numa_bitmask_alloc(numa_max_possible_node() + 1);
+	if (!bm)
+		tst_brk(TBROK | TERRNO, "numa_bitmask_alloc() failed");
+
+	numa_bitmask_setbit(bm, node);
+
+	ret = mbind(mem, size, MPOL_BIND, bm->maskp, bm->size + 1, 0);
+	if (ret) {
+		if (errno == ENOMEM)
+			tst_brk(TCONF, "Cannot mbind huge pages");
+
+		tst_brk(TBROK | TERRNO, "mbind() failed");
+	}
+
+	numa_bitmask_free(bm);
+
+	memset(mem, 0, size);
+
+	SAFE_MUNMAP(mem, size);
+}
+
 static void setup(void)
 {
 	int memfree, ret;
@@ -154,6 +193,9 @@ static void setup(void)
 	ret = get_allowed_nodes(NH_MEMS, TEST_NODES, &node1, &node2);
 	if (ret < 0)
 		tst_brk(TBROK | TERRNO, "get_allowed_nodes: %d", ret);
+
+	alloc_free_huge_on_node(node1, TEST_PAGES * hpsz);
+	alloc_free_huge_on_node(node2, TEST_PAGES * hpsz);
 }
 
 static void cleanup(void)
-- 
2.7.3


^ permalink raw reply related	[flat|nested] 11+ messages in thread
end of thread, other threads:[~2017-05-16  9:30 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2017-05-09 14:04 [LTP] [RFC] [PATCH] move_pages12: Allocate and free hugepages prior the test Cyril Hrubis
2017-05-10  8:56 ` Jan Stancek
2017-05-10 12:21   ` Cyril Hrubis
2017-05-10 13:01     ` Jan Stancek
2017-05-10 13:49   ` Cyril Hrubis
2017-05-10 14:14     ` Jan Stancek
2017-05-10 15:08       ` Cyril Hrubis
2017-05-11  6:40         ` Jan Stancek
2017-05-11 12:26           ` Cyril Hrubis
2017-05-11 12:50             ` Jan Stancek
2017-05-16  9:30               ` Cyril Hrubis

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