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selftests: cgroup: fix test_kmem_basic less than error

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test_kmem_basic creates 100,000 negative dentries, with each one mapping
to a slab object.  After memory.high is set, these are reclaimed through
the shrink_slab function call which reclaims all 100,000 entries.  The
test passes the majority of the time because when slab1 or current is
calculated, it is often above 0, however, 0 is also an acceptable value.

Link: https://lkml.kernel.org/r/7d6gcuyzdjcice6qbphrmpmv5skr5jtglg375unnjxqhstvhxc@qkn6dw6bao6v
Signed-off-by: Lucas Karpinski <lkarpins@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Zefan Li <lizefan.x@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Lucas Karpinski 2023-08-04 15:35:29 -04:00 committed by Andrew Morton
parent 49b0638502
commit 60439471f3
1 changed files with 2 additions and 2 deletions
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4
tools/testing/selftests/cgroup/test_kmem.c
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@ -75,11 +75,11 @@ static int test_kmem_basic(const char *root)
sleep(1);
slab1 = cg_read_key_long(cg, "memory.stat", "slab ");
if (slab1 <= 0)
if (slab1 < 0)
goto cleanup;
current = cg_read_long(cg, "memory.current");
if (current <= 0)
if (current < 0)
goto cleanup;
if (slab1 < slab0 / 2 && current < slab0 / 2)