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mm: memcg: put struct task_struct::memcg_in_oom under CONFIG_MEMCG_V1

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The memcg_in_oom field of the struct task_struct is not used by the cgroup
v2's memory controller, so it can be happily compiled out if
CONFIG_MEMCG_V1 is not set.

Link: https://lkml.kernel.org/r/20240628210317.272856-9-roman.gushchin@linux.dev
Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Roman Gushchin 2024-06-28 21:03:16 +00:00 committed by Andrew Morton
parent 98c9daf5ae
commit 1c3a0b3d0b
1 changed files with 3 additions and 1 deletions
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4
include/linux/sched.h
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@ -1447,9 +1447,11 @@ struct task_struct {
unsigned int kcov_softirq;
#endif
#ifdef CONFIG_MEMCG
#ifdef CONFIG_MEMCG_V1
struct mem_cgroup *memcg_in_oom;
#endif
#ifdef CONFIG_MEMCG
/* Number of pages to reclaim on returning to userland: */
unsigned int memcg_nr_pages_over_high;