linux-kernel - [RFC][PATCH v1 12/15] perf: export tracepoint events via sysfs: kmem

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Date:	Thu, 22 Jul 2010 19:17:35 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Ingo Molnar <mingo@...e.hu>,
	Christoph Lameter <cl@...ux-foundation.org>
Cc:	Robert Richter <robert.richter@....com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Johannes Berg <johannes@...solutions.net>,
	Peter Zijlstra <peterz@...radead.org>,
	Greg KH <greg@...ah.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Paul Mundt <lethal@...ux-sh.org>,
	"eranian@...il.com" <eranian@...il.com>,
	"Gary.Mohr@...l.com" <Gary.Mohr@...l.com>,
	"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Paul Mackerras <paulus@...ba.org>,
	"David S. Miller" <davem@...emloft.net>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Will Deacon <will.deacon@....com>,
	Maynard Johnson <mpjohn@...ibm.com>,
	Carl Love <carll@...ibm.com>,
	Kay Sievers <kay.sievers@...y.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: [RFC][PATCH v1 12/15] perf: export tracepoint events via sysfs:
 kmem

kmem tracepoint events are exported like below,

/sys/kernel/slab/events/
|-- kfree
|   |-- config
|   `-- type
|-- kmalloc
|   |-- config
|   `-- type
|-- kmalloc_node
|   |-- config
|   `-- type
|-- kmem_cache_alloc
|   |-- config
|   `-- type
|-- kmem_cache_alloc_node
|   |-- config
|   `-- type
|-- kmem_cache_free
|   |-- config
|   `-- type
|-- mm_page_alloc
|   |-- config
|   `-- type
|-- mm_page_alloc_extfrag
|   |-- config
|   `-- type
|-- mm_page_alloc_zone_locked
|   |-- config
|   `-- type
|-- mm_page_free_direct
|   |-- config
|   `-- type
|-- mm_page_pcpu_drain
|   |-- config
|   `-- type
`-- mm_pagevec_free
    |-- config
    `-- type
---
 mm/slub.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 7bb7940..0de39dd 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -27,6 +27,7 @@
 #include <linux/memory.h>
 #include <linux/math64.h>
 #include <linux/fault-inject.h>
+#include <linux/perf_event.h>
 
 /*
  * Lock order:
@@ -4554,6 +4555,8 @@ static int __init slab_sysfs_init(void)
 		return -ENOSYS;
 	}
 
+	perf_sys_add_tp(&slab_kset->kobj, "kmem");
+
 	slab_state = SYSFS;
 
 	list_for_each_entry(s, &slab_caches, list) {



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