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| author |   Maninder Singh <maninder1.s@samsung.com> | 2021-03-16 16:07:11 +0530 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@kernel.org> | 2021-05-10 16:01:41 -0700 |
| commit | e548eaa116d858f07816d41e24835a41f7e7d270 (patch) | |
| tree | c274be6f289534df53f36ebc78daa277af64e527 /mm/slub.c | |
| parent | mm/slub: Fix backtrace of objects to handle redzone adjustment (diff) | |
| download | linux-dev-e548eaa116d858f07816d41e24835a41f7e7d270.tar.xz linux-dev-e548eaa116d858f07816d41e24835a41f7e7d270.zip | |
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 <vbabka@suse.cz>
Co-developed-by: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/slub.c b/mm/slub.c index 8f2d13508ec9..deec894a1345 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -4011,6 +4011,13 @@ void kmem_obj_info(struct kmem_obj_info *kpp, void *object, struct page *page) if (!kpp->kp_stack[i]) break; } + + trackp = get_track(s, objp, TRACK_FREE); + for (i = 0; i < KS_ADDRS_COUNT && i < TRACK_ADDRS_COUNT; i++) { + kpp->kp_free_stack[i] = (void *)trackp->addrs[i]; + if (!kpp->kp_free_stack[i]) + break; + } #endif #endif } |