From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Changbin Du <changbin.du@gmail.com>
Subject: [for-linus][PATCH 4/5] mm, tracing: Print symbol name for call_site in trace events
Date: Sun, 29 Sep 2019 16:06:46 -0400 [thread overview]
Message-ID: <20190929200748.716201915@goodmis.org> (raw)
In-Reply-To: 20190929200642.036511084@goodmis.org
From: Changbin Du <changbin.du@gmail.com>
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>
---
include/trace/events/kmem.h | 7 ++++---
1 file 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,
--
2.20.1
next prev parent reply other threads:[~2019-09-29 20:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-29 20:06 [for-linus][PATCH 0/5] tracing: Minor fixes for the last pull request Steven Rostedt
2019-09-29 20:06 ` [for-linus][PATCH 1/5] tracing/probe: Fix to check the difference of nr_args before adding probe Steven Rostedt
2019-09-29 20:06 ` [for-linus][PATCH 2/5] tracing: Fix clang -Wint-in-bool-context warnings in IF_ASSIGN macro Steven Rostedt
2019-09-29 20:06 ` [for-linus][PATCH 3/5] tracing: Have error path in predicate_parse() free its allocated memory Steven Rostedt
2019-09-29 20:06 ` Steven Rostedt [this message]
2019-09-29 20:06 ` [for-linus][PATCH 5/5] selftests/ftrace: Fix same probe error test Steven Rostedt
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