diff options
| author | Suren Baghdasaryan <surenb@google.com> | 2022-07-31 12:42:21 -0700 |
|---|---|---|
| committer | Suren Baghdasaryan <surenb@google.com> | 2023-04-30 23:12:12 +0000 |
| commit | 64788ffb9d5023720daa76379ba6f7270a59863d (patch) | |
| tree | cbea2b76785e05319ba963db66140c5aefa6f8eb | |
| parent | 1befa67d505966fc1e46b92c2779a0f14d43e13b (diff) | |
lib: add codetag reference into slabobj_ext
To store code tag for every slab object, a codetag reference is embedded
into slabobj_ext when CONFIG_MEM_ALLOC_PROFILING=y.
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
| -rw-r--r-- | include/linux/memcontrol.h | 5 | ||||
| -rw-r--r-- | lib/Kconfig.debug | 1 | ||||
| -rw-r--r-- | mm/slab.h | 4 |
3 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 5e2da63c525f..c7f21b15b540 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1626,7 +1626,12 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, * if MEMCG_DATA_OBJEXTS is set. */ struct slabobj_ext { +#ifdef CONFIG_MEMCG_KMEM struct obj_cgroup *objcg; +#endif +#ifdef CONFIG_MEM_ALLOC_PROFILING + union codetag_ref ref; +#endif } __aligned(8); static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index d3aa5ee0bf0d..4157c2251b07 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -968,6 +968,7 @@ config MEM_ALLOC_PROFILING select CODE_TAGGING select LAZY_PERCPU_COUNTER select PAGE_EXTENSION + select SLAB_OBJ_EXT help Track allocation source code and record total allocation size initiated at that code location. The mechanism can be used to track diff --git a/mm/slab.h b/mm/slab.h index bec202bdcfb8..f953e7c81e98 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -418,6 +418,10 @@ int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s, static inline bool need_slab_obj_ext(void) { +#ifdef CONFIG_MEM_ALLOC_PROFILING + if (mem_alloc_profiling_enabled()) + return true; +#endif /* * CONFIG_MEMCG_KMEM creates vector of obj_cgroup objects conditionally * inside memcg_slab_post_alloc_hook. No other users for now. |