diff options
| author | Shakeel Butt <shakeel.butt@linux.dev> | 2025-11-08 02:40:41 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-11-21 00:43:59 +0300 |
| commit | bc8e51c05ad50a5a0b02114d3cc94d151a332595 (patch) | |
| tree | f4fb70d09c8fd6a0ada55921d0a7b58d1c065cb8 /include/linux | |
| parent | 05be0287955970b043a0742e85b6c285dea4f286 (diff) | |
| download | linux-bc8e51c05ad50a5a0b02114d3cc94d151a332595.tar.xz | |
mm: memcg: dump memcg protection info on oom or alloc failures
Currently kernel dumps memory state on oom and allocation failures. One
of the question usually raised on those dumps is why the kernel has not
reclaimed the reclaimable memory instead of triggering oom. One potential
reason is the usage of memory protection provided by memcg. So, let's
also dump the memory protected by the memcg in such reports to ease the
debugging.
Link: https://lkml.kernel.org/r/20251107234041.3632644-1-shakeel.butt@linux.dev
Signed-off-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/memcontrol.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 8c0f15e5978f..966f7c1a0128 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1764,6 +1764,7 @@ static inline void count_objcg_events(struct obj_cgroup *objcg, bool mem_cgroup_node_allowed(struct mem_cgroup *memcg, int nid); +void mem_cgroup_show_protected_memory(struct mem_cgroup *memcg); #else static inline bool mem_cgroup_kmem_disabled(void) { @@ -1830,6 +1831,10 @@ static inline bool mem_cgroup_node_allowed(struct mem_cgroup *memcg, int nid) { return true; } + +static inline void mem_cgroup_show_protected_memory(struct mem_cgroup *memcg) +{ +} #endif /* CONFIG_MEMCG */ #if defined(CONFIG_MEMCG) && defined(CONFIG_ZSWAP) |