From 2c1d697fb8ba6d2d44f914d4268ae1ccdf025f1b Mon Sep 17 00:00:00 2001 From: Hyeonggon Yoo <42.hyeyoo@gmail.com> Date: Wed, 17 Aug 2022 19:18:24 +0900 Subject: mm/slab_common: drop kmem_alloc & avoid dereferencing fields when not using Drop kmem_alloc event class, and define kmalloc and kmem_cache_alloc using TRACE_EVENT() macro. And then this patch does: - Do not pass pointer to struct kmem_cache to trace_kmalloc. gfp flag is enough to know if it's accounted or not. - Avoid dereferencing s->object_size and s->size when not using kmem_cache_alloc event. - Avoid dereferencing s->name in when not using kmem_cache_free event. - Adjust s->size to SLOB_UNITS(s->size) * SLOB_UNIT in SLOB Cc: Vasily Averin Suggested-by: Vlastimil Babka Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Reviewed-by: Vlastimil Babka Signed-off-by: Vlastimil Babka --- mm/slab.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'mm/slab.c') diff --git a/mm/slab.c b/mm/slab.c index 2fd400203ac2..a5486ff8362a 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3440,8 +3440,7 @@ void *__kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *lru, { void *ret = slab_alloc(cachep, lru, flags, cachep->object_size, _RET_IP_); - trace_kmem_cache_alloc(_RET_IP_, ret, cachep, cachep->object_size, - cachep->size, flags, NUMA_NO_NODE); + trace_kmem_cache_alloc(_RET_IP_, ret, cachep, flags, NUMA_NO_NODE); return ret; } @@ -3536,8 +3535,7 @@ void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid) { void *ret = slab_alloc_node(cachep, NULL, flags, nodeid, cachep->object_size, _RET_IP_); - trace_kmem_cache_alloc(_RET_IP_, ret, cachep, cachep->object_size, - cachep->size, flags, nodeid); + trace_kmem_cache_alloc(_RET_IP_, ret, cachep, flags, nodeid); return ret; } @@ -3607,7 +3605,7 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp) if (!cachep) return; - trace_kmem_cache_free(_RET_IP_, objp, cachep->name); + trace_kmem_cache_free(_RET_IP_, objp, cachep); __do_kmem_cache_free(cachep, objp, _RET_IP_); } EXPORT_SYMBOL(kmem_cache_free); -- cgit v1.2.3