Hi!
> testcases/kernel/mem/include/libmem.mk | 2 +-
> testcases/kernel/mem/lib/mem.c | 59
> +++++++++++++++++++++++++++-------
> 2 files changed, 49 insertions(+), 12 deletions(-)
>
> diff --git a/testcases/kernel/mem/include/libmem.mk
> b/testcases/kernel/mem/include/libmem.mk
> index 4503e78..bb5a163 100644
> --- a/testcases/kernel/mem/include/libmem.mk
> +++ b/testcases/kernel/mem/include/libmem.mk
> @@ -24,7 +24,7 @@ LIBMEM_DIR := $(MEM_DIR)/lib
> LIBMEM := $(LIBMEM_DIR)/libmem.a
> FILTER_OUT_DIRS := $(LIBMEM_DIR)
> CFLAGS += -I$(MEM_SRCDIR)/include
> -LDLIBS += $(NUMA_LIBS) -lmem -lltp
> +LDLIBS += $(NUMA_LIBS) -lmem -lltp -lpthread
> LDFLAGS += -L$(LIBMEM_DIR)
You should add -pthread to CFLAGS instead, otherwise the code will fail
to compile on some distributions.
> $(LIBMEM_DIR):
> diff --git a/testcases/kernel/mem/lib/mem.c b/testcases/kernel/mem/lib/mem.c
> index 37cf18f..1862e26 100644
> --- a/testcases/kernel/mem/lib/mem.c
> +++ b/testcases/kernel/mem/lib/mem.c
> @@ -12,6 +12,7 @@
> #if HAVE_NUMAIF_H
> #include <numaif.h>
> #endif
> +#include <pthread.h>
> #include <stdarg.h>
> #include <stdio.h>
> #include <string.h>
> @@ -30,7 +31,8 @@ static int alloc_mem(long int length, int testcase)
> char *s;
> long i, pagesz = getpagesize();
>
> - tst_resm(TINFO, "allocating %ld bytes.", length);
> + tst_resm(TINFO, "thread (%lx), allocating %ld bytes.",
> + (unsigned long) pthread_self(), length);
>
> s = mmap(NULL, length, PROT_READ | PROT_WRITE,
> MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
> @@ -49,18 +51,52 @@ static int alloc_mem(long int length, int testcase)
> return 0;
> }
>
> -static void test_alloc(int testcase, int lite)
> +static void *child_alloc_thread(void *args)
> {
> - int ret;
> + int *testcase = args;
> + int ret = 0;
> +
> + /* keep allocating until there's an error */
> + while (!ret)
> + ret = alloc_mem(LENGTH, *testcase);
You can do
ret = alloc_mem(LENGHT, (long)args)
here and
TEST(pthread_create(&th[i], NULL, child_alloc_thread,
(void*)((long)testcase)));
in the caller.
But given that the caller joins the threads before it exits the function
the pointer to testcase will be vaild at the time this function is
executed.
> + exit(ret);
And and it's a bit confusing that the pthread_join() is likely not
reached because the first finishing thread exits the child here.
But at lest there is a comment below.
Maybe we can just wait in the caller thread indefinitely.
> +}
> +
> +static void child_alloc(int testcase, int lite, int threads)
> +{
> + int i;
> + pthread_t *th;
>
> if (lite) {
> - ret = alloc_mem(TESTMEM + MB, testcase);
> - } else {
> - ret = 0;
> - while (!ret)
> - ret = alloc_mem(LENGTH, testcase);
> + int ret = alloc_mem(TESTMEM + MB, testcase);
> + exit(ret);
> }
> - exit(ret);
> +
> + th = malloc(sizeof(pthread_t) * threads);
> + if (!th) {
> + tst_resm(TINFO | TERRNO, "malloc");
> + goto out;
> + }
> +
> + for (i = 0; i < threads; i++) {
> + TEST(pthread_create(&th[i], NULL, child_alloc_thread,
> + &testcase));
> + if (TEST_RETURN) {
> + tst_resm(TINFO | TRERRNO, "pthread_create");
> + goto out;
> + }
> + }
> +
> + /* wait for one of threads to exit whole process */
> + for (i = 0; i < threads; i++) {
> + TEST(pthread_join(th[i], NULL));
> + if (TEST_RETURN) {
> + tst_resm(TINFO | TRERRNO, "pthread_join");
> + goto out;
> + }
> + }
> +out:
> + exit(1);
> }
>
> /*
> @@ -81,13 +117,14 @@ static void test_alloc(int testcase, int lite)
> void oom(int testcase, int lite, int retcode, int allow_sigkill)
> {
> pid_t pid;
> - int status;
> + int status, threads;
>
> switch (pid = fork()) {
> case -1:
> tst_brkm(TBROK | TERRNO, cleanup, "fork");
> case 0:
> - test_alloc(testcase, lite);
> + threads = MAX(1, tst_ncpus() - 1);
> + child_alloc(testcase, lite, threads);
> default:
> break;
> }
> --
> 1.8.3.1
>
>
> ------------------------------------------------------------------------------
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--
Cyril Hrubis
chru...@suse.cz
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