+ selftests-cgroup-fix-test_kmem_basic-slab1-check.patch added to mm-hotfixes-unstable branch

+ selftests-cgroup-fix-test_kmem_basic-slab1-check.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: selftests: cgroup: fix test_kmem_basic slab1 check
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     selftests-cgroup-fix-test_kmem_basic-slab1-check.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-cgroup-fix-test_kmem_basic-slab1-check.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Lucas Karpinski <lkarpins@redhat.com>
Subject: selftests: cgroup: fix test_kmem_basic slab1 check
Date: Thu, 3 Aug 2023 14:25:00 -0400

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 is calculated, it
is often above 0, however, 0 is also an acceptable value.

Link: https://lkml.kernel.org/r/zff2gqiy4cggy4px2hbcyna6eipy56qc4itx5cx5agtxlzdxt7@dvfdarqkucac
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>
---

 tools/testing/selftests/cgroup/test_kmem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/tools/testing/selftests/cgroup/test_kmem.c~selftests-cgroup-fix-test_kmem_basic-slab1-check
+++ a/tools/testing/selftests/cgroup/test_kmem.c
@@ -75,7 +75,7 @@ static int test_kmem_basic(const char *r
 	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");
_

Patches currently in -mm which might be from lkarpins@redhat.com are

selftests-cgroup-fix-test_kmem_basic-slab1-check.patch