On 2/21/24 20:40, Suren Baghdasaryan wrote: > 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 <[email protected]> > Co-developed-by: Kent Overstreet <[email protected]> > Signed-off-by: Kent Overstreet <[email protected]>
Reviewed-by: Vlastimil Babka <[email protected]> > --- > include/linux/memcontrol.h | 5 +++++ > lib/Kconfig.debug | 1 + > 2 files changed, 6 insertions(+) > > diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h > index f3584e98b640..2b010316016c 100644 > --- a/include/linux/memcontrol.h > +++ b/include/linux/memcontrol.h > @@ -1653,7 +1653,12 @@ 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 7bbdb0ddb011..9ecfcdb54417 100644 > --- a/lib/Kconfig.debug > +++ b/lib/Kconfig.debug > @@ -979,6 +979,7 @@ config MEM_ALLOC_PROFILING > depends on !DEBUG_FORCE_WEAK_PER_CPU > 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
