From e548eaa116d858f07816d41e24835a41f7e7d270 Mon Sep 17 00:00:00 2001 From: Maninder Singh Date: Tue, 16 Mar 2021 16:07:11 +0530 Subject: mm/slub: Add Support for free path information of an object This commit adds enables a stack dump for the last free of an object: slab kmalloc-64 start c8ab0140 data offset 64 pointer offset 0 size 64 allocated at meminfo_proc_show+0x40/0x4fc [ 20.192078] meminfo_proc_show+0x40/0x4fc [ 20.192263] seq_read_iter+0x18c/0x4c4 [ 20.192430] proc_reg_read_iter+0x84/0xac [ 20.192617] generic_file_splice_read+0xe8/0x17c [ 20.192816] splice_direct_to_actor+0xb8/0x290 [ 20.193008] do_splice_direct+0xa0/0xe0 [ 20.193185] do_sendfile+0x2d0/0x438 [ 20.193345] sys_sendfile64+0x12c/0x140 [ 20.193523] ret_fast_syscall+0x0/0x58 [ 20.193695] 0xbeeacde4 [ 20.193822] Free path: [ 20.193935] meminfo_proc_show+0x5c/0x4fc [ 20.194115] seq_read_iter+0x18c/0x4c4 [ 20.194285] proc_reg_read_iter+0x84/0xac [ 20.194475] generic_file_splice_read+0xe8/0x17c [ 20.194685] splice_direct_to_actor+0xb8/0x290 [ 20.194870] do_splice_direct+0xa0/0xe0 [ 20.195014] do_sendfile+0x2d0/0x438 [ 20.195174] sys_sendfile64+0x12c/0x140 [ 20.195336] ret_fast_syscall+0x0/0x58 [ 20.195491] 0xbeeacde4 Acked-by: Vlastimil Babka Co-developed-by: Vaneet Narang Signed-off-by: Vaneet Narang Signed-off-by: Maninder Singh Signed-off-by: Paul E. McKenney --- mm/slab.h | 1 + 1 file changed, 1 insertion(+) (limited to 'mm/slab.h') diff --git a/mm/slab.h b/mm/slab.h index 18c1927cd196..7189daa0c586 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -640,6 +640,7 @@ struct kmem_obj_info { struct kmem_cache *kp_slab_cache; void *kp_ret; void *kp_stack[KS_ADDRS_COUNT]; + void *kp_free_stack[KS_ADDRS_COUNT]; }; void kmem_obj_info(struct kmem_obj_info *kpp, void *object, struct page *page); #endif -- cgit v1.2.3