@@ -55,3 +55,4 @@ hugeshmget01 hugeshmget01 -i 10
hugeshmget02 hugeshmget02 -i 10
hugeshmget03 hugeshmget03 -i 10
hugeshmget05 hugeshmget05 -i 10
+hugeshmget06 hugeshmget06 -i 10
@@ -47,6 +47,7 @@
/hugetlb/hugeshmget/hugeshmget02
/hugetlb/hugeshmget/hugeshmget03
/hugetlb/hugeshmget/hugeshmget05
+/hugetlb/hugeshmget/hugeshmget06
/ksm/ksm01
/ksm/ksm02
/ksm/ksm03
new file mode 100644
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2005-2006, IBM Corporation.
+ * Author: David Gibson & Adam Litke
+ */
+
+/*\
+ * [Description]
+ * This testcase creates shared memory segments backed by hugepages,
+ * writes specific patterns to each segment, verifies pattern,
+ * and detaches a shared memory segments in a loop.
+ * It ensures that the hugepage backed shared memory functionalities
+ * works correctly by validating the data written to segment.
+ */
+
+#include "hugetlb.h"
+#include "tst_safe_sysv_ipc.h"
+
+#define MNTPOINT "hugetlbfs/"
+#define NR_HUGEPAGES 4
+
+static long hpage_size;
+static int shmid = -1;
+
+static void run_test(void)
+{
+ size_t i, j;
+ char pattern;
+ char *shmaddr;
+
+ shmaddr = SAFE_SHMAT(shmid, 0, SHM_RND);
+ tst_res(TINFO, "shmaddr: %p", shmaddr);
+
+ for (i = 0; i < NR_HUGEPAGES; i++) {
+ pattern = 65 + (i % 26);
+ tst_res(TINFO, "Touching %p with %c",
+ shmaddr + (i * hpage_size), pattern);
+ memset(shmaddr + (i * hpage_size), pattern, hpage_size);
+ }
+
+ for (i = 0; i < NR_HUGEPAGES; i++) {
+ pattern = 65 + (i % 26);
+ tst_res(TINFO, "Verifying %p", (shmaddr + (i * hpage_size)));
+ for (j = 0; j < (size_t)hpage_size; j++)
+ if (*(shmaddr + (i * hpage_size) + j) != pattern) {
+ tst_res(TFAIL, "Got wrong byte 0x%02x expected 0x%02x",
+ *(shmaddr + (i * hpage_size) + j),
+ pattern);
+ return;
+ }
+ }
+ SAFE_SHMDT((const void *)shmaddr);
+ tst_res(TPASS, "shm hugepages works correctly");
+}
+
+static void setup(void)
+{
+ hpage_size = tst_get_hugepage_size();
+ tst_res(TINFO, "hugepage size is %ld", hpage_size);
+ shmid = SAFE_SHMGET(IPC_PRIVATE, NR_HUGEPAGES * hpage_size, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W);
+ tst_res(TINFO, "shmid: 0x%x", shmid);
+}
+
+static void cleanup(void)
+{
+ if (shmid >= 0)
+ SAFE_SHMCTL(shmid, IPC_RMID, NULL);
+}
+
+static struct tst_test test = {
+ .needs_root = 1,
+ .mntpoint = MNTPOINT,
+ .setup = setup,
+ .cleanup = cleanup,
+ .test_all = run_test,
+ .hugepages = {NR_HUGEPAGES, TST_NEEDS},
+};
Test Description: This testcase creates shared memory segments backed by hugepages, writes specific patterns to each segment, verifies pattern and detaches a shared memory segments in a loop. This looping test was added to verify the functionality of large page backed shared memory segments. A segment is created, written, verified, and detached a specified number of times. -Updated 'kernel/mem/.gitignore' -Updated 'runtest/hugetlb' for number of iterations with -i 10 Signed-off-by: Sachin P Bappalige <sachinpb@linux.ibm.com> --- runtest/hugetlb | 1 + testcases/kernel/mem/.gitignore | 1 + .../mem/hugetlb/hugeshmget/hugeshmget06.c | 77 +++++++++++++++++++ 3 files changed, 79 insertions(+) create mode 100644 testcases/kernel/mem/hugetlb/hugeshmget/hugeshmget06.c