Sometimes, the testcase fail like:
hugeshmat04 0 TINFO : set nr_hugepages to 512
hugeshmat04 1 TBROK : hugeshmat04.c:103: shmget:
errno=EINVAL(22): Invalid argument
hugeshmat04 2 TBROK : hugeshmat04.c:103: Remaining cases broken
hugeshmat04 0 TINFO : set nr_hugepages to 0
The testbed info:
# cat /proc/sys/kernel/shmmax
536870912
# uname -r
3.10.0-295.el7.x86_64
The reason is that the 'shmmax' of a system is not enough for shmget() function
to get 1G memory.
On RHEL7 system, we have a BUG to enlarge this value, but I can't guarantee
this programe could
running well with other distribution. So, a proposed path as follow:
Signed-off-by: Li Wang <liw...@redhat.com>
---
testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat04.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat04.c
b/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat04.c
index 7f0fbca..aeac3f7 100644
--- a/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat04.c
+++ b/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat04.c
@@ -123,13 +123,15 @@ void shared_hugepage(void)
void setup(void)
{
- long mem_total, hpage_size;
+ long mem_total, hpage_size, shmmax;
tst_require_root(NULL);
mem_total = read_meminfo("MemTotal:");
- if (mem_total < 2L*1024*1024) {
- tst_resm(TCONF, "Test requires more than 2GB of RAM");
+ SAFE_FILE_SCANF(NULL, PATH_SHMMAX, "%ld", &shmmax);
+ if (mem_total < 2L*1024*1024 || shmmax < SIZE) {
+ tst_resm(TCONF,
+ "Test requires more than 2GB of RAM or need a lager
'shmmax' value for testing");
tst_exit();
}
--
1.8.3.1
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