On 7/5/19 2:20 PM, Andrew Morton wrote: > On Fri, 5 Jul 2019 21:09:24 +0800 kbuild test robot <lkp@xxxxxxxxx> wrote: > >> tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git master >> head: 22c45ec32b4a9fa8c48ef4f5bf9b189b307aae12 >> commit: 8236f517d69e2217f5200d7f700e8b18b01c94c8 [12342/12641] mm: shrinker: make shrinker not depend on memcg kmem >> config: x86_64-randconfig-s2-07051907 (attached as .config) >> compiler: gcc-7 (Debian 7.4.0-9) 7.4.0 >> reproduce: >> git checkout 8236f517d69e2217f5200d7f700e8b18b01c94c8 >> # save the attached .config to linux build tree >> make ARCH=x86_64 >> >> If you fix the issue, kindly add following tag >> Reported-by: kbuild test robot <lkp@xxxxxxxxx> >> >> All error/warnings (new ones prefixed by >>): >> >> mm/vmscan.c: In function 'prealloc_memcg_shrinker': >>>> mm/vmscan.c:205:7: error: implicit declaration of function 'memcg_expand_shrinker_maps'; did you mean 'memcg_set_shrinker_bit'? [-Werror=implicit-function-declaration] >> if (memcg_expand_shrinker_maps(id)) { >> ^~~~~~~~~~~~~~~~~~~~~~~~~~ >> memcg_set_shrinker_bit >> In file included from include/linux/rbtree.h:22:0, >> from include/linux/mm_types.h:10, >> from include/linux/mmzone.h:21, >> from include/linux/gfp.h:6, >> from include/linux/mm.h:10, >> from mm/vmscan.c:17: >> mm/vmscan.c: In function 'shrink_slab_memcg': >>>> mm/vmscan.c:593:54: error: 'struct mem_cgroup_per_node' has no member named 'shrinker_map' > > This? > > --- a/include/linux/memcontrol.h~mm-shrinker-make-shrinker-not-depend-on-memcg-kmem-fix > +++ a/include/linux/memcontrol.h > @@ -128,7 +128,7 @@ struct mem_cgroup_per_node { > > struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1]; > > -#ifdef CONFIG_MEMCG_KMEM > +#ifdef CONFIG_MEMCG > struct memcg_shrinker_map __rcu *shrinker_map; > #endif > struct rb_node tree_node; /* RB tree node */ > @@ -1272,6 +1272,7 @@ static inline bool mem_cgroup_under_sock > > struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep); > void memcg_kmem_put_cache(struct kmem_cache *cachep); > +extern int memcg_expand_shrinker_maps(int new_id); > > #ifdef CONFIG_MEMCG_KMEM > int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order); > @@ -1339,8 +1340,6 @@ static inline int memcg_cache_id(struct > return memcg ? memcg->kmemcg_id : -1; > } > > -extern int memcg_expand_shrinker_maps(int new_id); > - > extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg, > int nid, int shrinker_id); > #else > _ > Now I see this: ld: mm/vmscan.o: in function `prealloc_shrinker': vmscan.c:(.text+0x3090): undefined reference to `memcg_expand_shrinker_maps' And for the record, I reported this yesterday on mmotm: https://lore.kernel.org/lkml/9cbdb785-b51d-9419-6b9a-ec282a4e4fa2@xxxxxxxxxxxxx/ Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> thanks, -- ~Randy
