@@ -22,7 +22,7 @@
#include "libnewipc.h"
static int *queues;
-static int maxshms, queue_cnt;
+static int maxshms, queue_cnt, used_cnt;
static key_t shmkey;
static void verify_shmget(void)
@@ -36,11 +36,13 @@ static void setup(void)
int res, num;
shmkey = GETIPCKEY();
-
+ used_cnt = GET_USED_SEGMENTS();
+ tst_res(TINFO, "Current environment %d shared memory segments are already in use",
+ used_cnt);
SAFE_FILE_SCANF("/proc/sys/kernel/shmmni", "%i", &maxshms);
- queues = SAFE_MALLOC(maxshms * sizeof(int));
- for (num = 0; num < maxshms; num++) {
+ queues = SAFE_MALLOC((maxshms - used_cnt) * sizeof(int));
+ for (num = 0; num < maxshms - used_cnt; num++) {
res = shmget(shmkey + num, SHM_SIZE, IPC_CREAT | IPC_EXCL | SHM_RW);
if (res == -1)
tst_brk(TBROK | TERRNO, "shmget failed unexpectedly");
Before this patch, we don't consider this situation that system has consumed shared memory segments. So we hit the ENOSPC error unexpectedly in setup. Use GET_USED_SEGMENTS() to get the used shared memory segments, so we can trigger the ENOSPC error correctly(just hit the limit) even current environment has consumed some shared memory segments. I don't use this api in verify function since we don't support run cases in parallel and we should assume this situation that this case is the only case to use(free or alloc) sysv ipc resource at that time. Fixes: #842 Fixes: 4dc493b44 ("syscalls/shmget*: Convert into new api") Reviewed-by: Cyril Hrubis <chrubis@suse.cz> Reviewed-by: Petr Vorel <pvorel@suse.cz> Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com> --- testcases/kernel/syscalls/ipc/shmget/shmget03.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)