From: He Zhe Date: Mon, 19 Apr 2021 09:09:28 +0000 (+0000) Subject: fix: mm, tracing: kfree event name mismatching with provider kmem (v5.12) X-Git-Tag: v2.12.6~11 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=ff21ec486f70f8e177e98b5877020c83a5e6601e;p=lttng-modules.git fix: mm, tracing: kfree event name mismatching with provider kmem (v5.12) a8bc8ae5c932 ("fix: mm, tracing: record slab name for kmem_cache_free() (v5.12)") introduces the following call trace for kfree. This is caused by mismatch between kfree event and its provider kmem. This patch maps kfree to kmem_kfree. WARNING: CPU: 2 PID: 42294 at src/lttng-probes.c:81 fixup_lazy_probes+0xb0/0x1b0 [lttng_tracer] CPU: 2 PID: 42294 Comm: modprobe Tainted: G O 5.12.0-rc6-yoctodev-standard #1 Hardware name: Intel Corporation JACOBSVILLE/JACOBSVILLE, BIOS JBVLCRB2.86B.0014.P20.2004020248 04/02/2020 RIP: 0010:fixup_lazy_probes+0xb0/0x1b0 [lttng_tracer] Code: 75 28 83 c3 01 3b 5d c4 74 22 48 8b 4d d0 48 63 c3 4c 89 e2 4c 89 f6 48 8b 04 c1 4c 8b 38 4c 89 ff e8 64 9f 4b de 85 c0 74 c3 <0f> 0b 48 8b 05 bf f2 1e 00 48 8d 50 e8 48 3d f0 a0 98 c0 75 18 eb RSP: 0018:ffffb976807bfbe0 EFLAGS: 00010286 RAX: 00000000ffffffff RBX: 0000000000000004 RCX: 0000000000000004 RDX: 0000000000000066 RSI: ffffffffc03c10a7 RDI: ffffffffc03c11a1 RBP: ffffb976807bfc28 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000004 R13: ffffffffc03c2000 R14: ffffffffc03c10a7 R15: ffffffffc03c11a1 FS: 00007f0ef9533740(0000) GS:ffffa100faa00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000561e8f0aa000 CR3: 000000015b318000 CR4: 0000000000350ee0 Call Trace: lttng_probe_register+0x38/0xe0 [lttng_tracer] ? __event_probe__module_load+0x520/0x520 [lttng_probe_module] __lttng_events_init__module+0x15/0x20 [lttng_probe_module] do_one_initcall+0x68/0x310 ? kmem_cache_alloc_trace+0x2ad/0x4c0 ? do_init_module+0x28/0x280 do_init_module+0x62/0x280 load_module+0x26e4/0x2920 ? kernel_read_file+0x22e/0x290 __do_sys_finit_module+0xb1/0xf0 __x64_sys_finit_module+0x1a/0x20 do_syscall_64+0x38/0x50 entry_SYSCALL_64_after_hwframe+0x44/0xae Signed-off-by: He Zhe Signed-off-by: Mathieu Desnoyers Change-Id: I00e8ee2b8c35f6f8602c88295f5113fbbd139709 --- diff --git a/instrumentation/events/lttng-module/kmem.h b/instrumentation/events/lttng-module/kmem.h index d787ea54..c9edee61 100644 --- a/instrumentation/events/lttng-module/kmem.h +++ b/instrumentation/events/lttng-module/kmem.h @@ -88,7 +88,9 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(kmem_alloc_node, kmem_cache_alloc_node, ) #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,12,0)) -LTTNG_TRACEPOINT_EVENT(kfree, +LTTNG_TRACEPOINT_EVENT_MAP(kfree, + + kmem_kfree, TP_PROTO(unsigned long call_site, const void *ptr),