The patch titled
Subject: arm64/mm: fix a bogus GFP flag in pgd_alloc()
has been added to the -mm tree. Its filename is
arm64-switch-to-generic-version-of-pte-allocation-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/arm64-switch-to-generic-version-of-pte-allocation-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/arm64-switch-to-generic-version-of-pte-allocation-fix.patch
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------------------------------------------------------
From: Qian Cai <cai@xxxxxx>
Subject: arm64/mm: fix a bogus GFP flag in pgd_alloc()
The commit "arm64: switch to generic version of pte allocation"
introduced endless failures during boot like,
kobject_add_internal failed for pgd_cache(285:chronyd.service) (error:
-2 parent: cgroup)
It turns out __GFP_ACCOUNT is passed to kernel page table allocations
and then later memcg finds out those don't belong to any cgroup.
backtrace:
kobject_add_internal
kobject_init_and_add
sysfs_slab_add+0x1a8
__kmem_cache_create
create_cache
memcg_create_kmem_cache
memcg_kmem_cache_create_func
process_one_work
worker_thread
kthread
Link: http://lkml.kernel.org/r/1559656836-24940-1-git-send-email-cai@xxxxxx
Signed-off-by: Qian Cai <cai@xxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/mm/pgd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm64/mm/pgd.c~arm64-switch-to-generic-version-of-pte-allocation-fix
+++ a/arch/arm64/mm/pgd.c
@@ -38,7 +38,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
if (PGD_SIZE == PAGE_SIZE)
return (pgd_t *)__get_free_page(gfp);
else
- return kmem_cache_alloc(pgd_cache, gfp);
+ return kmem_cache_alloc(pgd_cache, GFP_PGTABLE_KERNEL);
}
void pgd_free(struct mm_struct *mm, pgd_t *pgd)
_
Patches currently in -mm which might be from cai@xxxxxx are
iommu-replace-single-char-identifiers-in-macros.patch
arm64-switch-to-generic-version-of-pte-allocation-fix.patch
drivers-base-memory-pass-a-block_id-to-init_memory_block-fix.patch
z3fold-add-inter-page-compaction-fix-2.patch
