Oops! Seems like skip the test is not the best way. We should better, at least
one times,
to enlarge the 'shmmax' to an appropriate values and then try...
So I'm sorry, pls ignore this one, I will post a V2.
-----------
# ./hugeshmat04
hugeshmat04 0 TINFO : set nr_hugepages to 1024
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 512
# cat /proc/sys/kernel/shmmax
1073741823
# echo 1073741824 >/proc/sys/kernel/shmmax
# ./hugeshmat04
hugeshmat04 0 TINFO : set nr_hugepages to 1024
hugeshmat04 1 TPASS : No regression found.
hugeshmat04 2 TPASS : No regression found.
hugeshmat04 3 TPASS : No regression found.
hugeshmat04 0 TINFO : set nr_hugepages to 512
--
Regards,
Li Wang
Email: liw...@redhat.com
----- Original Message -----
> 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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