There was a problem reported upstream that the allocator may see an
empty nodemask when changing cpuset's mems.
http://lkml.org/lkml/2010/5/4/77
http://lkml.org/lkml/2010/5/4/79
http://lkml.org/lkml/2010/5/4/80
This test is based on the reproducers for the above issue.
Signed-off-by: CAI Qian <[email protected]>
---
v3: fix test name and code cleanup.
v2: use LTP_ATTRIBUTE_*; merge a few functions.
runtest/mm | 2 +
testcases/kernel/mem/cpuset/Makefile | 25 +++
testcases/kernel/mem/cpuset/cpuset01.c | 350 ++++++++++++++++++++++++++++++++
3 files changed, 377 insertions(+), 0 deletions(-)
create mode 100644 testcases/kernel/mem/cpuset/Makefile
create mode 100644 testcases/kernel/mem/cpuset/cpuset01.c
diff --git a/runtest/mm b/runtest/mm
index 7abdf98..cf16c0e 100644
--- a/runtest/mm
+++ b/runtest/mm
@@ -66,3 +66,5 @@ hugemmap05 hugemmap05
hugemmap05_1 hugemmap05 -m
hugemmap05_2 hugemmap05 -s
hugemmap05_3 hugemmap05 -s -m
+
+cpuset01 cpuset01 -I 3600
diff --git a/testcases/kernel/mem/cpuset/Makefile
b/testcases/kernel/mem/cpuset/Makefile
new file mode 100644
index 0000000..65d3aab
--- /dev/null
+++ b/testcases/kernel/mem/cpuset/Makefile
@@ -0,0 +1,25 @@
+#
+# Copyright (C) 2010 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or (at
+# your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
+#
+
+top_srcdir ?= ../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
+
+LDLIBS += -lnuma -lm
diff --git a/testcases/kernel/mem/cpuset/cpuset01.c
b/testcases/kernel/mem/cpuset/cpuset01.c
new file mode 100644
index 0000000..a41a42b
--- /dev/null
+++ b/testcases/kernel/mem/cpuset/cpuset01.c
@@ -0,0 +1,350 @@
+/*
+ * Out Of Memory when changing cpuset's mems on NUMA. There was a
+ * problem reported upstream that the allocator may see an empty
+ * nodemask when changing cpuset's mems.
+ * http://lkml.org/lkml/2010/5/4/77
+ * http://lkml.org/lkml/2010/5/4/79
+ * http://lkml.org/lkml/2010/5/4/80
+ * This test is based on the reproducers for the above issue.
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it
+ * is free of the rightful claim of any third person regarding
+ * infringement or the like. Any license provided herein, whether
+ * implied or otherwise, applies only to this software file. Patent
+ * licenses, if any, provided herein do not apply to combinations of
+ * this program with other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#include "test.h"
+#include "usctest.h"
+#include "config.h"
+
+char *TCID = "cpuset01";
+int TST_TOTAL = 1;
+extern int Tst_count;
+
+#if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \
+ && HAVE_MPOL_CONSTANTS
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <sys/mman.h>
+#include <sys/mount.h>
+#include <numaif.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <err.h>
+#include <math.h>
+#include <signal.h>
+#include <stdarg.h>
+
+#define MAXNODES 512
+#define CPATH "/dev/cpuset"
+#define CPATH_NEW "/dev/cpuset/1"
+#define _PATH_SYS_SYSTEM "/sys/devices/system"
+
+static pid_t *pids;
+volatile int end;
+
+static void setup(void);
+static void cleanup(void) LTP_ATTRIBUTE_NORETURN;
+static int testcpuset(void);
+static void sighandler(int signo LTP_ATTRIBUTE_UNUSED);
+static int mem_hog(void);
+static long count_numa(void);
+static long count_cpu(void);
+static int path_exist(const char *path, ...);
+static int mem_hog_cpuset(int ntasks);
+
+int main(int argc, char *argv[])
+{
+ char *msg;
+
+ msg = parse_opts(argc, argv, NULL, NULL);
+ if (msg != NULL)
+ tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s",
+ msg);
+ setup();
+ TEST(testcpuset());
+ cleanup();
+}
+int testcpuset(void)
+{
+ int lc;
+ FILE *fp;
+ char buf[BUFSIZ], value[BUFSIZ];
+ int fd, child, i, status;
+ unsigned long nnodes = 1, nmask = 0, ncpus = 1;
+
+ nnodes = count_numa();
+ ncpus = count_cpu();
+
+ snprintf(buf, BUFSIZ, "%s/cpus", CPATH);
+ fp = fopen(buf, "r");
+ if (fp == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fopen");
+ if (fgets(value, BUFSIZ, fp) == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fgets");
+ fclose(fp);
+
+ /* Remove the trailing newline. */
+ value[strlen(value) - 1] = '\0';
+ snprintf(buf, BUFSIZ, "%s/cpus", CPATH_NEW);
+ fd = open(buf, O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+ if (write(fd, value, strlen(value)) != strlen(value))
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ close(fd);
+
+ snprintf(buf, BUFSIZ, "%s/mems", CPATH);
+ fp = fopen(buf, "r");
+ if (fp == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fopen");
+ if (fgets(value, BUFSIZ, fp) == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fgets");
+ fclose(fp);
+
+ snprintf(buf, BUFSIZ, "%s/mems", CPATH_NEW);
+ fd = open(buf, O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+ if (write(fd, value, strlen(value)) != strlen(value))
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ close(fd);
+
+ snprintf(buf, BUFSIZ, "%s/tasks", CPATH_NEW);
+ fd = open(buf, O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+ snprintf(buf, BUFSIZ, "%d", getpid());
+ if (write(fd, buf, strlen(buf)) != strlen(buf))
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ close(fd);
+
+ pids = malloc(nnodes * sizeof(pid_t));
+ if (!pids)
+ tst_brkm(TBROK|TERRNO, cleanup, "malloc");
+
+ switch (child = fork()) {
+ case -1:
+ tst_brkm(TBROK|TERRNO, cleanup, "fork");
+ case 0:
+ for (i = 0; i < nnodes; i++)
+ nmask += exp2f(i);
+
+ if (set_mempolicy(MPOL_BIND, &nmask, MAXNODES) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "set_mempolicy");
+ mem_hog_cpuset(ncpus > 1 ? ncpus : 1);
+ exit(0);
+ }
+ snprintf(buf, BUFSIZ, "%s/mems", CPATH_NEW);
+ fd = open(buf, O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+ /* Reset Tst_count in case we are looping. */
+ Tst_count = 0;
+
+ if (write(fd, "0", 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+
+ if (lseek(fd, 0, SEEK_SET) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "lseek");
+
+ if (write(fd, "1", 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ }
+ close(fd);
+
+ if (waitpid(child, &status, WUNTRACED | WCONTINUED) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "waitpid");
+ if (WEXITSTATUS(status) != 0)
+ tst_resm(TFAIL, "child exit status is %d",
+ WEXITSTATUS(status));
+ return 0;
+}
+void setup(void)
+{
+ if (count_numa() == 1) {
+ tst_resm(TCONF, "required a NUMA system.");
+ tst_exit();
+ }
+
+ /*
+ * setup a default signal hander and a
+ * temporary working directory.
+ */
+ tst_sig(FORK, DEF_HANDLER, cleanup);
+ TEST_PAUSE;
+ tst_tmpdir();
+
+ if (mkdir(CPATH, 0777) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "mkdir");
+ if (mount("cpuset", CPATH, "cpuset", 0, NULL) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "mount");
+ if (mkdir(CPATH_NEW, 0777) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "mkdir");
+}
+void cleanup(void)
+{
+ FILE *fp;
+ int fd;
+ char s_new[BUFSIZ], s[BUFSIZ], value[BUFSIZ];
+
+ /* Move all processes in task to its parent cpuset node. */
+ snprintf(s, BUFSIZ, "%s/tasks", CPATH);
+ fd = open(s, O_WRONLY);
+ if (fd == -1)
+ tst_resm(TWARN|TERRNO, "open");
+
+ snprintf(s_new, BUFSIZ, "%s/tasks", CPATH_NEW);
+ fp = fopen(s_new, "r");
+ if (fp == NULL)
+ tst_resm(TWARN|TERRNO, "fopen");
+
+ if ((fd != -1) && (fp != NULL)) {
+ while (fgets(value, BUFSIZ, fp) != NULL)
+ if (write(fd, value, strlen(value) - 1)
+ != strlen(value) - 1)
+ tst_resm(TWARN|TERRNO, "write");
+ }
+ if (fd != -1)
+ close(fd);
+ if (fp != NULL)
+ fclose(fp);
+ if (rmdir(CPATH_NEW) == -1)
+ tst_resm(TWARN|TERRNO, "rmdir");
+ if (umount(CPATH) == -1)
+ tst_resm(TWARN|TERRNO, "umount");
+ if (rmdir(CPATH) == -1)
+ tst_resm(TWARN|TERRNO, "rmdir");
+
+ /*
+ * remove the tmp directory and exit
+ */
+ TEST_CLEANUP;
+ tst_rmdir();
+ tst_exit();
+}
+void sighandler(int signo LTP_ATTRIBUTE_UNUSED)
+{
+ end = 1;
+}
+int mem_hog(void)
+{
+ long pagesize;
+ unsigned long *addr;
+ int ret = 0;
+
+ pagesize = getpagesize();
+ while (!end) {
+ addr = mmap(NULL, pagesize * 10, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ if (addr == MAP_FAILED) {
+ ret = 1;
+ tst_resm(TFAIL|TERRNO, "mmap");
+ break;
+ }
+ memset(addr, 0xF7, pagesize * 10);
+ munmap(addr, pagesize * 10);
+ }
+ return ret;
+}
+int mem_hog_cpuset(int ntasks)
+{
+ int i, pid, status, ret = 0;
+ struct sigaction sa;
+
+ if (ntasks <= 0)
+ tst_brkm(TBROK|TERRNO, cleanup, "ntasks is small.");
+
+ sa.sa_handler = sighandler;
+ if (sigemptyset(&sa.sa_mask) < 0)
+ tst_brkm(TBROK|TERRNO, cleanup, "sigemptyset");
+
+ sa.sa_flags = 0;
+ if (sigaction(SIGUSR1, &sa, NULL) < 0)
+ tst_brkm(TBROK|TERRNO, cleanup, "sigaction");
+
+ for (i = 0; i < ntasks; i++) {
+ switch (pid = fork()) {
+ case -1:
+ tst_resm(TFAIL|TERRNO, "fork");
+ ret = 1;
+ break;
+ case 0:
+ ret = mem_hog();
+ exit(ret);
+ default:
+ if (kill(pid, SIGUSR1) == -1) {
+ tst_resm(TINFO|TERRNO, "kill");
+ ret = 1;
+ }
+ break;
+ }
+ }
+ while (waitpid(-1, &status, WUNTRACED | WCONTINUED) > 0) {
+ if (WEXITSTATUS(status) != 0) {
+ tst_resm(TFAIL, "child exit status is %d",
+ WEXITSTATUS(status));
+ ret = 1;
+ }
+ }
+ return ret;
+}
+long count_numa(void)
+{
+ int nnodes = 0;
+
+ while(path_exist(_PATH_SYS_SYSTEM "/node/node%d", nnodes))
+ nnodes++;
+
+ return nnodes;
+}
+
+long count_cpu(void)
+{
+ int ncpus = 0;
+
+ while(path_exist(_PATH_SYS_SYSTEM "/cpu/cpu%d", ncpus))
+ ncpus++;
+
+ return ncpus;
+}
+
+static int path_exist(const char *path, ...)
+{
+ va_list ap;
+ char pathbuf[PATH_MAX];
+
+ va_start(ap, path);
+ vsnprintf(pathbuf, sizeof(pathbuf), path, ap);
+ va_end(ap);
+
+ return access(pathbuf, F_OK) == 0;
+}
+#else /* no NUMA */
+int main(void) {
+ tst_resm(TCONF, "no NUMA development packages installed.");
+ tst_exit();
+}
+#endif
--
1.7.1From: CAI Qian <[email protected]>
Date: Tue, 30 Nov 2010 17:36:53 +0800
Subject: [PATCH v3] Out Of Memory when changing cpuset's mems on NUMA
There was a problem reported upstream that the allocator may see an
empty nodemask when changing cpuset's mems.
http://lkml.org/lkml/2010/5/4/77
http://lkml.org/lkml/2010/5/4/79
http://lkml.org/lkml/2010/5/4/80
This test is based on the reproducers for the above issue.
Signed-off-by: CAI Qian <[email protected]>
---
v3: fix test name and code cleanup.
v2: use LTP_ATTRIBUTE_*; merge a few functions.
runtest/mm | 2 +
testcases/kernel/mem/cpuset/Makefile | 25 +++
testcases/kernel/mem/cpuset/cpuset01.c | 350 ++++++++++++++++++++++++++++++++
3 files changed, 377 insertions(+), 0 deletions(-)
create mode 100644 testcases/kernel/mem/cpuset/Makefile
create mode 100644 testcases/kernel/mem/cpuset/cpuset01.c
diff --git a/runtest/mm b/runtest/mm
index 7abdf98..cf16c0e 100644
--- a/runtest/mm
+++ b/runtest/mm
@@ -66,3 +66,5 @@ hugemmap05 hugemmap05
hugemmap05_1 hugemmap05 -m
hugemmap05_2 hugemmap05 -s
hugemmap05_3 hugemmap05 -s -m
+
+cpuset01 cpuset01 -I 3600
diff --git a/testcases/kernel/mem/cpuset/Makefile b/testcases/kernel/mem/cpuset/Makefile
new file mode 100644
index 0000000..65d3aab
--- /dev/null
+++ b/testcases/kernel/mem/cpuset/Makefile
@@ -0,0 +1,25 @@
+#
+# Copyright (C) 2010 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or (at
+# your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
+#
+
+top_srcdir ?= ../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
+
+LDLIBS += -lnuma -lm
diff --git a/testcases/kernel/mem/cpuset/cpuset01.c b/testcases/kernel/mem/cpuset/cpuset01.c
new file mode 100644
index 0000000..a41a42b
--- /dev/null
+++ b/testcases/kernel/mem/cpuset/cpuset01.c
@@ -0,0 +1,350 @@
+/*
+ * Out Of Memory when changing cpuset's mems on NUMA. There was a
+ * problem reported upstream that the allocator may see an empty
+ * nodemask when changing cpuset's mems.
+ * http://lkml.org/lkml/2010/5/4/77
+ * http://lkml.org/lkml/2010/5/4/79
+ * http://lkml.org/lkml/2010/5/4/80
+ * This test is based on the reproducers for the above issue.
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it
+ * is free of the rightful claim of any third person regarding
+ * infringement or the like. Any license provided herein, whether
+ * implied or otherwise, applies only to this software file. Patent
+ * licenses, if any, provided herein do not apply to combinations of
+ * this program with other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#include "test.h"
+#include "usctest.h"
+#include "config.h"
+
+char *TCID = "cpuset01";
+int TST_TOTAL = 1;
+extern int Tst_count;
+
+#if HAVE_NUMA_H && HAVE_LINUX_MEMPOLICY_H && HAVE_NUMAIF_H \
+ && HAVE_MPOL_CONSTANTS
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <sys/mman.h>
+#include <sys/mount.h>
+#include <numaif.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <err.h>
+#include <math.h>
+#include <signal.h>
+#include <stdarg.h>
+
+#define MAXNODES 512
+#define CPATH "/dev/cpuset"
+#define CPATH_NEW "/dev/cpuset/1"
+#define _PATH_SYS_SYSTEM "/sys/devices/system"
+
+static pid_t *pids;
+volatile int end;
+
+static void setup(void);
+static void cleanup(void) LTP_ATTRIBUTE_NORETURN;
+static int testcpuset(void);
+static void sighandler(int signo LTP_ATTRIBUTE_UNUSED);
+static int mem_hog(void);
+static long count_numa(void);
+static long count_cpu(void);
+static int path_exist(const char *path, ...);
+static int mem_hog_cpuset(int ntasks);
+
+int main(int argc, char *argv[])
+{
+ char *msg;
+
+ msg = parse_opts(argc, argv, NULL, NULL);
+ if (msg != NULL)
+ tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s",
+ msg);
+ setup();
+ TEST(testcpuset());
+ cleanup();
+}
+int testcpuset(void)
+{
+ int lc;
+ FILE *fp;
+ char buf[BUFSIZ], value[BUFSIZ];
+ int fd, child, i, status;
+ unsigned long nnodes = 1, nmask = 0, ncpus = 1;
+
+ nnodes = count_numa();
+ ncpus = count_cpu();
+
+ snprintf(buf, BUFSIZ, "%s/cpus", CPATH);
+ fp = fopen(buf, "r");
+ if (fp == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fopen");
+ if (fgets(value, BUFSIZ, fp) == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fgets");
+ fclose(fp);
+
+ /* Remove the trailing newline. */
+ value[strlen(value) - 1] = '\0';
+ snprintf(buf, BUFSIZ, "%s/cpus", CPATH_NEW);
+ fd = open(buf, O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+ if (write(fd, value, strlen(value)) != strlen(value))
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ close(fd);
+
+ snprintf(buf, BUFSIZ, "%s/mems", CPATH);
+ fp = fopen(buf, "r");
+ if (fp == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fopen");
+ if (fgets(value, BUFSIZ, fp) == NULL)
+ tst_brkm(TBROK|TERRNO, cleanup, "fgets");
+ fclose(fp);
+
+ snprintf(buf, BUFSIZ, "%s/mems", CPATH_NEW);
+ fd = open(buf, O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+ if (write(fd, value, strlen(value)) != strlen(value))
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ close(fd);
+
+ snprintf(buf, BUFSIZ, "%s/tasks", CPATH_NEW);
+ fd = open(buf, O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+ snprintf(buf, BUFSIZ, "%d", getpid());
+ if (write(fd, buf, strlen(buf)) != strlen(buf))
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ close(fd);
+
+ pids = malloc(nnodes * sizeof(pid_t));
+ if (!pids)
+ tst_brkm(TBROK|TERRNO, cleanup, "malloc");
+
+ switch (child = fork()) {
+ case -1:
+ tst_brkm(TBROK|TERRNO, cleanup, "fork");
+ case 0:
+ for (i = 0; i < nnodes; i++)
+ nmask += exp2f(i);
+
+ if (set_mempolicy(MPOL_BIND, &nmask, MAXNODES) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "set_mempolicy");
+ mem_hog_cpuset(ncpus > 1 ? ncpus : 1);
+ exit(0);
+ }
+ snprintf(buf, BUFSIZ, "%s/mems", CPATH_NEW);
+ fd = open(buf, O_WRONLY);
+ if (fd == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "open");
+
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+ /* Reset Tst_count in case we are looping. */
+ Tst_count = 0;
+
+ if (write(fd, "0", 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+
+ if (lseek(fd, 0, SEEK_SET) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "lseek");
+
+ if (write(fd, "1", 1) != 1)
+ tst_brkm(TBROK|TERRNO, cleanup, "write");
+ }
+ close(fd);
+
+ if (waitpid(child, &status, WUNTRACED | WCONTINUED) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "waitpid");
+ if (WEXITSTATUS(status) != 0)
+ tst_resm(TFAIL, "child exit status is %d",
+ WEXITSTATUS(status));
+ return 0;
+}
+void setup(void)
+{
+ if (count_numa() == 1) {
+ tst_resm(TCONF, "required a NUMA system.");
+ tst_exit();
+ }
+
+ /*
+ * setup a default signal hander and a
+ * temporary working directory.
+ */
+ tst_sig(FORK, DEF_HANDLER, cleanup);
+ TEST_PAUSE;
+ tst_tmpdir();
+
+ if (mkdir(CPATH, 0777) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "mkdir");
+ if (mount("cpuset", CPATH, "cpuset", 0, NULL) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "mount");
+ if (mkdir(CPATH_NEW, 0777) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "mkdir");
+}
+void cleanup(void)
+{
+ FILE *fp;
+ int fd;
+ char s_new[BUFSIZ], s[BUFSIZ], value[BUFSIZ];
+
+ /* Move all processes in task to its parent cpuset node. */
+ snprintf(s, BUFSIZ, "%s/tasks", CPATH);
+ fd = open(s, O_WRONLY);
+ if (fd == -1)
+ tst_resm(TWARN|TERRNO, "open");
+
+ snprintf(s_new, BUFSIZ, "%s/tasks", CPATH_NEW);
+ fp = fopen(s_new, "r");
+ if (fp == NULL)
+ tst_resm(TWARN|TERRNO, "fopen");
+
+ if ((fd != -1) && (fp != NULL)) {
+ while (fgets(value, BUFSIZ, fp) != NULL)
+ if (write(fd, value, strlen(value) - 1)
+ != strlen(value) - 1)
+ tst_resm(TWARN|TERRNO, "write");
+ }
+ if (fd != -1)
+ close(fd);
+ if (fp != NULL)
+ fclose(fp);
+ if (rmdir(CPATH_NEW) == -1)
+ tst_resm(TWARN|TERRNO, "rmdir");
+ if (umount(CPATH) == -1)
+ tst_resm(TWARN|TERRNO, "umount");
+ if (rmdir(CPATH) == -1)
+ tst_resm(TWARN|TERRNO, "rmdir");
+
+ /*
+ * remove the tmp directory and exit
+ */
+ TEST_CLEANUP;
+ tst_rmdir();
+ tst_exit();
+}
+void sighandler(int signo LTP_ATTRIBUTE_UNUSED)
+{
+ end = 1;
+}
+int mem_hog(void)
+{
+ long pagesize;
+ unsigned long *addr;
+ int ret = 0;
+
+ pagesize = getpagesize();
+ while (!end) {
+ addr = mmap(NULL, pagesize * 10, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ if (addr == MAP_FAILED) {
+ ret = 1;
+ tst_resm(TFAIL|TERRNO, "mmap");
+ break;
+ }
+ memset(addr, 0xF7, pagesize * 10);
+ munmap(addr, pagesize * 10);
+ }
+ return ret;
+}
+int mem_hog_cpuset(int ntasks)
+{
+ int i, pid, status, ret = 0;
+ struct sigaction sa;
+
+ if (ntasks <= 0)
+ tst_brkm(TBROK|TERRNO, cleanup, "ntasks is small.");
+
+ sa.sa_handler = sighandler;
+ if (sigemptyset(&sa.sa_mask) < 0)
+ tst_brkm(TBROK|TERRNO, cleanup, "sigemptyset");
+
+ sa.sa_flags = 0;
+ if (sigaction(SIGUSR1, &sa, NULL) < 0)
+ tst_brkm(TBROK|TERRNO, cleanup, "sigaction");
+
+ for (i = 0; i < ntasks; i++) {
+ switch (pid = fork()) {
+ case -1:
+ tst_resm(TFAIL|TERRNO, "fork");
+ ret = 1;
+ break;
+ case 0:
+ ret = mem_hog();
+ exit(ret);
+ default:
+ if (kill(pid, SIGUSR1) == -1) {
+ tst_resm(TINFO|TERRNO, "kill");
+ ret = 1;
+ }
+ break;
+ }
+ }
+ while (waitpid(-1, &status, WUNTRACED | WCONTINUED) > 0) {
+ if (WEXITSTATUS(status) != 0) {
+ tst_resm(TFAIL, "child exit status is %d",
+ WEXITSTATUS(status));
+ ret = 1;
+ }
+ }
+ return ret;
+}
+long count_numa(void)
+{
+ int nnodes = 0;
+
+ while(path_exist(_PATH_SYS_SYSTEM "/node/node%d", nnodes))
+ nnodes++;
+
+ return nnodes;
+}
+
+long count_cpu(void)
+{
+ int ncpus = 0;
+
+ while(path_exist(_PATH_SYS_SYSTEM "/cpu/cpu%d", ncpus))
+ ncpus++;
+
+ return ncpus;
+}
+
+static int path_exist(const char *path, ...)
+{
+ va_list ap;
+ char pathbuf[PATH_MAX];
+
+ va_start(ap, path);
+ vsnprintf(pathbuf, sizeof(pathbuf), path, ap);
+ va_end(ap);
+
+ return access(pathbuf, F_OK) == 0;
+}
+#else /* no NUMA */
+int main(void) {
+ tst_resm(TCONF, "no NUMA development packages installed.");
+ tst_exit();
+}
+#endif
--
1.7.1
------------------------------------------------------------------------------
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