From 88f2ef73fd66491a2f9a82373d22ca6540f23c62 Mon Sep 17 00:00:00 2001 From: Muchun Song Date: Tue, 22 Mar 2022 14:40:56 -0700 Subject: mm: introduce kmem_cache_alloc_lru We currently allocate scope for every memcg to be able to tracked on every superblock instantiated in the system, regardless of whether that superblock is even accessible to that memcg. These huge memcg counts come from container hosts where memcgs are confined to just a small subset of the total number of superblocks that instantiated at any given point in time. For these systems with huge container counts, list_lru does not need the capability of tracking every memcg on every superblock. What it comes down to is that adding the memcg to the list_lru at the first insert. So introduce kmem_cache_alloc_lru to allocate objects and its list_lru. In the later patch, we will convert all inode and dentry allocation from kmem_cache_alloc to kmem_cache_alloc_lru. Link: https://lkml.kernel.org/r/20220228122126.37293-3-songmuchun@bytedance.com Signed-off-by: Muchun Song Cc: Alex Shi Cc: Anna Schumaker Cc: Chao Yu Cc: Dave Chinner Cc: Fam Zheng Cc: Jaegeuk Kim Cc: Johannes Weiner Cc: Kari Argillander Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Qi Zheng Cc: Roman Gushchin Cc: Shakeel Butt Cc: Theodore Ts'o Cc: Trond Myklebust Cc: Vladimir Davydov Cc: Vlastimil Babka Cc: Wei Yang Cc: Xiongchun Duan Cc: Yang Shi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/slab.c | 39 +++++++++++++++++++++++++++------------ 1 file changed, 27 insertions(+), 12 deletions(-) (limited to 'mm/slab.c') diff --git a/mm/slab.c b/mm/slab.c index ddf5737c63d9..d9dec7a8fd79 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3211,7 +3211,7 @@ slab_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid, size_t orig_ bool init = false; flags &= gfp_allowed_mask; - cachep = slab_pre_alloc_hook(cachep, &objcg, 1, flags); + cachep = slab_pre_alloc_hook(cachep, NULL, &objcg, 1, flags); if (unlikely(!cachep)) return NULL; @@ -3287,7 +3287,8 @@ __do_cache_alloc(struct kmem_cache *cachep, gfp_t flags) #endif /* CONFIG_NUMA */ static __always_inline void * -slab_alloc(struct kmem_cache *cachep, gfp_t flags, size_t orig_size, unsigned long caller) +slab_alloc(struct kmem_cache *cachep, struct list_lru *lru, gfp_t flags, + size_t orig_size, unsigned long caller) { unsigned long save_flags; void *objp; @@ -3295,7 +3296,7 @@ slab_alloc(struct kmem_cache *cachep, gfp_t flags, size_t orig_size, unsigned lo bool init = false; flags &= gfp_allowed_mask; - cachep = slab_pre_alloc_hook(cachep, &objcg, 1, flags); + cachep = slab_pre_alloc_hook(cachep, lru, &objcg, 1, flags); if (unlikely(!cachep)) return NULL; @@ -3484,6 +3485,18 @@ void ___cache_free(struct kmem_cache *cachep, void *objp, __free_one(ac, objp); } +static __always_inline +void *__kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *lru, + gfp_t flags) +{ + void *ret = slab_alloc(cachep, lru, flags, cachep->object_size, _RET_IP_); + + trace_kmem_cache_alloc(_RET_IP_, ret, + cachep->object_size, cachep->size, flags); + + return ret; +} + /** * kmem_cache_alloc - Allocate an object * @cachep: The cache to allocate from. @@ -3496,15 +3509,17 @@ void ___cache_free(struct kmem_cache *cachep, void *objp, */ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags) { - void *ret = slab_alloc(cachep, flags, cachep->object_size, _RET_IP_); - - trace_kmem_cache_alloc(_RET_IP_, ret, - cachep->object_size, cachep->size, flags); - - return ret; + return __kmem_cache_alloc_lru(cachep, NULL, flags); } EXPORT_SYMBOL(kmem_cache_alloc); +void *kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *lru, + gfp_t flags) +{ + return __kmem_cache_alloc_lru(cachep, lru, flags); +} +EXPORT_SYMBOL(kmem_cache_alloc_lru); + static __always_inline void cache_alloc_debugcheck_after_bulk(struct kmem_cache *s, gfp_t flags, size_t size, void **p, unsigned long caller) @@ -3521,7 +3536,7 @@ int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size, size_t i; struct obj_cgroup *objcg = NULL; - s = slab_pre_alloc_hook(s, &objcg, size, flags); + s = slab_pre_alloc_hook(s, NULL, &objcg, size, flags); if (!s) return 0; @@ -3562,7 +3577,7 @@ kmem_cache_alloc_trace(struct kmem_cache *cachep, gfp_t flags, size_t size) { void *ret; - ret = slab_alloc(cachep, flags, size, _RET_IP_); + ret = slab_alloc(cachep, NULL, flags, size, _RET_IP_); ret = kasan_kmalloc(cachep, ret, size, flags); trace_kmalloc(_RET_IP_, ret, @@ -3689,7 +3704,7 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags, cachep = kmalloc_slab(size, flags); if (unlikely(ZERO_OR_NULL_PTR(cachep))) return cachep; - ret = slab_alloc(cachep, flags, size, caller); + ret = slab_alloc(cachep, NULL, flags, size, caller); ret = kasan_kmalloc(cachep, ret, size, flags); trace_kmalloc(caller, ret, -- cgit v1.2.3