[LTP] [PATCH] getrusage03: skip on small RAM system

[Li Wang]

It is easy to get VmSwap increase with a small system, here is
run with a 1G RAM kvm guest and TBROK:

    7	tst_test.c:1365: TINFO: Timeout per run is 0h 05m 00s
    8	getrusage03.c:43: TPASS: initial.self ~= child.self
    9	getrusage03.c:57: TPASS: initial.children ~= 100MB
    10	getrusage03.c:66: TPASS: child.children == 0
    11	getrusage03.c:84: TPASS: child.children ~= 300MB
    12	getrusage03.c:104: TPASS: initial.children ~= pre_wait.children
    13	getrusage03.c:112: TPASS: post_wait.children ~= 400MB
    14	getrusage03.h:25: TBROK: VmSwap is not zero
    15	getrusage03.c:133: TPASS: initial.children ~= after_zombie.children
    16	getrusage03.h:25: TBROK: VmSwap is not zero
    17	getrusage03_child.c:57: TPASS: initial.self ~= exec.self
    18	getrusage03_child.c:62: TPASS: initial.children ~= exec.children

Signed-off-by: Li Wang <liwang@redhat.com>
---

Notes:
    Ps. I also think we might need .min_mem_[avai|total] field but
        not sure if it is really necessary to add that.

 testcases/kernel/syscalls/getrusage/getrusage03.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/testcases/kernel/syscalls/getrusage/getrusage03.c b/testcases/kernel/syscalls/getrusage/getrusage03.c
index bf5127483..5aa0b2326 100644
--- a/testcases/kernel/syscalls/getrusage/getrusage03.c
+++ b/testcases/kernel/syscalls/getrusage/getrusage03.c
@@ -173,6 +173,14 @@ static void run(unsigned int i)
 	}
 }
 
+static void setup(void)
+{
+	long long mem_avail = tst_available_mem();
+
+	if (mem_avail < 512L*1024)
+		tst_brk(TCONF, "Needed > 512MB availabe, only have: %ld kB", mem_avail);
+}
+
 static struct tst_test test = {
 	.forks_child = 1,
 	.child_needs_reinit = 1,
@@ -182,6 +190,7 @@ static struct tst_test test = {
 		{"linux-git", "1f10206cf8e9"},
 		{}
 	},
+	.setup = setup,
 	.test = run,
 	.tcnt = ARRAY_SIZE(testfunc_list),
 };
-- 
2.31.1