diff options
| author | Suren Baghdasaryan <surenb@google.com> | 2022-07-31 12:42:21 -0700 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-08-12 14:31:04 -0400 |
| commit | be0c5253654c49eb89cef77cc32b40aaf7965d00 (patch) | |
| tree | 78a66fa13b1983cdbce707d71581077d7b5ee37c | |
| parent | 9165ebce2da0ea7dd69cf7c020981cd903e5b833 (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 c736a00f911a..e97527ef37e6 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -967,6 +967,7 @@ config MEM_ALLOC_PROFILING depends on PROC_FS select CODE_TAGGING 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 63957aae5f16..1477ac95c1fb 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. |