The patch titled
Subject: kselftests: cgroup: update kmem test precision tolerance
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
kselftests-cgroup-update-kmem-test-precision-tolerance.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kselftests-cgroup-update-kmem-test-precision-tolerance.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: Michal Hocko <mhocko@xxxxxxxx>
Subject: kselftests: cgroup: update kmem test precision tolerance
Date: Fri, 2 Dec 2022 09:50:26 +0100
OK, so this is a full patch to fix this
---
>From 7f338ed952ba4a100822004bc8399bf720b42899 Mon Sep 17 00:00:00 2001
Date: Fri, 2 Dec 2022 09:45:29 +0100
Subject: [PATCH] kselftests: cgroup: update kmem test precision tolerance
1813e51eece0 ("memcg: increase MEMCG_CHARGE_BATCH to 64") has changed
the batch size while this test case has been left behind. This has led
to a test failure reported by test bot:
not ok 2 selftests: cgroup: test_kmem # exit=1
Update the tolerance for the pcp charges to reflect the
MEMCG_CHARGE_BATCH change to fix this.
Link: https://lkml.kernel.org/r/Y4m8Unt6FhWKC6IH@xxxxxxxxxxxxxx
Fixes: 1813e51eece0a ("memcg: increase MEMCG_CHARGE_BATCH to 64")
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
Reported-by: kernel test robot <yujie.liu@xxxxxxxxx>
Link: https://lore.kernel.org/oe-lkp/202212010958.c1053bd3-yujie.liu@xxxxxxxxx
Acked-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Acked-by: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Tested-by: Yujie Liu <yujie.liu@xxxxxxxxx>
Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Feng Tang <feng.tang@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: "Michal Koutný" <mkoutny@xxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Soheil Hassas Yeganeh <soheil@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/cgroup/test_kmem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/testing/selftests/cgroup/test_kmem.c~kselftests-cgroup-update-kmem-test-precision-tolerance
+++ a/tools/testing/selftests/cgroup/test_kmem.c
@@ -24,7 +24,7 @@
* the maximum discrepancy between charge and vmstat entries is number
* of cpus multiplied by 32 pages.
*/
-#define MAX_VMSTAT_ERROR (4096 * 32 * get_nprocs())
+#define MAX_VMSTAT_ERROR (4096 * 64 * get_nprocs())
static int alloc_dcache(const char *cgroup, void *arg)
_
Patches currently in -mm which might be from mhocko@xxxxxxxx are
kselftests-cgroup-update-kmem-test-precision-tolerance.patch
