selftests: expanding more mlock selftest

This patch will randomly perform mlock/mlock2 on a given memory region,
and verify the RLIMIT_MEMLOCK limitation works properly.

Suggested-by: David Rientjes <rientjes@google.com>
Link: http://lkml.kernel.org/r/1473325970-11393-4-git-send-email-wei.guo.simon@gmail.com
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Eric B Munson <emunson@akamai.com>
Cc: Simon Guo <wei.guo.simon@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Alexey Klimov <klimov.linux@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 76 deletions

diff --git a/tools/testing/selftests/vm/mlock-intersect-test.c b/tools/testing/selftests/vm/mlock-intersect-test.c
deleted file mode 100644
index f78e68a0967c..000000000000
--- a/tools/testing/selftests/vm/mlock-intersect-test.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * It tests the duplicate mlock result:
- * - the ulimit of lock page is 64k
- * - allocate address area 64k starting from p
- * - mlock   [p -- p + 30k]
- * - Then mlock address  [ p -- p + 40k ]
- *
- * It should succeed since totally we locked
- * 40k < 64k limitation.
- *
- * It should not be run with CAP_IPC_LOCK.
- */
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <sys/resource.h>
-#include <sys/capability.h>
-#include <sys/mman.h>
-#include "mlock2.h"
-
-int main(int argc, char **argv)
-{
-	struct rlimit new;
-	char *p = NULL;
-	cap_t cap = cap_init();
-	int i;
-
-	/* drop capabilities including CAP_IPC_LOCK */
-	if (cap_set_proc(cap))
-		return -1;
-
-	/* set mlock limits to 64k */
-	new.rlim_cur = 65536;
-	new.rlim_max = 65536;
-	setrlimit(RLIMIT_MEMLOCK, &new);
-
-	/* test VM_LOCK */
-	p = malloc(1024 * 64);
-	if (mlock(p, 1024 * 30)) {
-		printf("mlock() 30k return failure.\n");
-		return -1;
-	}
-	for (i = 0; i < 10; i++) {
-		if (mlock(p, 1024 * 40)) {
-			printf("mlock() #%d 40k returns failure.\n", i);
-			return -1;
-		}
-	}
-	for (i = 0; i < 10; i++) {
-		if (mlock2_(p, 1024 * 40, MLOCK_ONFAULT)) {
-			printf("mlock2_() #%d 40k returns failure.\n", i);
-			return -1;
-		}
-	}
-	free(p);
-
-	/* Test VM_LOCKONFAULT */
-	p = malloc(1024 * 64);
-	if (mlock2_(p, 1024 * 30, MLOCK_ONFAULT)) {
-		printf("mlock2_() 30k return failure.\n");
-		return -1;
-	}
-	for (i = 0; i < 10; i++) {
-		if (mlock2_(p, 1024 * 40, MLOCK_ONFAULT)) {
-			printf("mlock2_() #%d 40k returns failure.\n", i);
-			return -1;
-		}
-	}
-	for (i = 0; i < 10; i++) {
-		if (mlock(p, 1024 * 40)) {
-			printf("mlock() #%d 40k returns failure.\n", i);
-			return -1;
-		}
-	}
-	return 0;
-}