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| author | Changbin Du <changbin.du@gmail.com> | 2019-09-14 12:32:15 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-09-28 23:13:39 +0200 |
| commit | f7d6316fb43735ae8af969c2e582fbee85709483 (patch) | |
| tree | dee179100411da66f4f41bc622d7ea4c83c65f7d | |
| parent | tracing: Have error path in predicate_parse() free its allocated memory (diff) | |
| download | linux-f7d6316fb43735ae8af969c2e582fbee85709483.tar.xz linux-f7d6316fb43735ae8af969c2e582fbee85709483.zip | |
mm, tracing: Print symbol name for call_site in trace events
To improve the readability of raw slab trace points, print the call_site ip
using '%pS'. Then we can grep events with function names.
[002] .... 808.188897: kmem_cache_free: call_site=putname+0x47/0x50 ptr=00000000cef40c80
[002] .... 808.188898: kfree: call_site=security_cred_free+0x42/0x50 ptr=0000000062400820
[002] .... 808.188904: kmem_cache_free: call_site=put_cred_rcu+0x88/0xa0 ptr=0000000058d74ef8
[002] .... 808.188913: kmem_cache_alloc: call_site=prepare_creds+0x26/0x100 ptr=0000000058d74ef8 bytes_req=168 bytes_alloc=576 gfp_flags=GFP_KERNEL
[002] .... 808.188917: kmalloc: call_site=security_prepare_creds+0x77/0xa0 ptr=0000000062400820 bytes_req=8 bytes_alloc=336 gfp_flags=GFP_KERNEL|__GFP_ZERO
[002] .... 808.188920: kmem_cache_alloc: call_site=getname_flags+0x4f/0x1e0 ptr=00000000cef40c80 bytes_req=4096 bytes_alloc=4480 gfp_flags=GFP_KERNEL
[002] .... 808.188925: kmem_cache_free: call_site=putname+0x47/0x50 ptr=00000000cef40c80
[002] .... 808.188926: kfree: call_site=security_cred_free+0x42/0x50 ptr=0000000062400820
[002] .... 808.188931: kmem_cache_free: call_site=put_cred_rcu+0x88/0xa0 ptr=0000000058d74ef8
Link: http://lkml.kernel.org/r/20190914103215.23301-1-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| -rw-r--r-- | include/trace/events/kmem.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h index eb57e3037deb..69e8bb8963db 100644 --- a/include/trace/events/kmem.h +++ b/include/trace/events/kmem.h @@ -35,8 +35,8 @@ DECLARE_EVENT_CLASS(kmem_alloc, __entry->gfp_flags = gfp_flags; ), - TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s", - __entry->call_site, + TP_printk("call_site=%pS ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s", + (void *)__entry->call_site, __entry->ptr, __entry->bytes_req, __entry->bytes_alloc, @@ -131,7 +131,8 @@ DECLARE_EVENT_CLASS(kmem_free, __entry->ptr = ptr; ), - TP_printk("call_site=%lx ptr=%p", __entry->call_site, __entry->ptr) + TP_printk("call_site=%pS ptr=%p", + (void *)__entry->call_site, __entry->ptr) ); DEFINE_EVENT(kmem_free, kfree, |