---

yaml --- r: 140593 b: refs/heads/master c: 36994e5 h: refs/heads/master i: 140591: bf0e174 v: v3
git-mirror · Dec 30, 2008 · 0ea692b · 0ea692b
1 parent 9cd4f14
commit 0ea692b
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Showing 13 changed files with 402 additions and 42 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7a51cffbd10886c0557677dd916c090097c691ef
+refs/heads/master: 36994e58a48fb8f9651c7dc845a6de298aba5bfc
diff --git a/trunk/include/linux/slab_def.h b/trunk/include/linux/slab_def.h
@@ -14,7 +14,7 @@
 #include <asm/page.h>		/* kmalloc_sizes.h needs PAGE_SIZE */
 #include <asm/cache.h>		/* kmalloc_sizes.h needs L1_CACHE_BYTES */
 #include <linux/compiler.h>
-#include <linux/kmemtrace.h>
+#include <trace/kmemtrace.h>
 
 /* Size description struct for general caches. */
 struct cache_sizes {

diff --git a/trunk/include/linux/slub_def.h b/trunk/include/linux/slub_def.h
@@ -10,7 +10,7 @@
 #include <linux/gfp.h>
 #include <linux/workqueue.h>
 #include <linux/kobject.h>
-#include <linux/kmemtrace.h>
+#include <trace/kmemtrace.h>
 
 enum stat_item {
 	ALLOC_FASTPATH,		/* Allocation from cpu slab */

diff --git a/trunk/include/linux/kmemtrace.h → trunk/include/trace/kmemtrace.h b/trunk/include/linux/kmemtrace.h → trunk/include/trace/kmemtrace.h
@@ -22,28 +22,17 @@ enum kmemtrace_type_id {
 
 extern void kmemtrace_init(void);
 
-static inline void kmemtrace_mark_alloc_node(enum kmemtrace_type_id type_id,
+extern void kmemtrace_mark_alloc_node(enum kmemtrace_type_id type_id,
 					     unsigned long call_site,
 					     const void *ptr,
 					     size_t bytes_req,
 					     size_t bytes_alloc,
 					     gfp_t gfp_flags,
-					     int node)
-{
-	trace_mark(kmemtrace_alloc, "type_id %d call_site %lu ptr %lu "
-		   "bytes_req %lu bytes_alloc %lu gfp_flags %lu node %d",
-		   type_id, call_site, (unsigned long) ptr,
-		   (unsigned long) bytes_req, (unsigned long) bytes_alloc,
-		   (unsigned long) gfp_flags, node);
-}
+					     int node);
 
-static inline void kmemtrace_mark_free(enum kmemtrace_type_id type_id,
+extern void kmemtrace_mark_free(enum kmemtrace_type_id type_id,
 				       unsigned long call_site,
-				       const void *ptr)
-{
-	trace_mark(kmemtrace_free, "type_id %d call_site %lu ptr %lu",
-		   type_id, call_site, (unsigned long) ptr);
-}
+				       const void *ptr);
 
 #else /* CONFIG_KMEMTRACE */
 

diff --git a/trunk/init/main.c b/trunk/init/main.c
@@ -70,7 +70,7 @@
 #include <asm/setup.h>
 #include <asm/sections.h>
 #include <asm/cacheflush.h>
-#include <linux/kmemtrace.h>
+#include <trace/kmemtrace.h>
 
 #ifdef CONFIG_X86_LOCAL_APIC
 #include <asm/smp.h>

diff --git a/trunk/kernel/trace/Kconfig b/trunk/kernel/trace/Kconfig
@@ -264,6 +264,28 @@ config HW_BRANCH_TRACER
 	  This tracer records all branches on the system in a circular
 	  buffer giving access to the last N branches for each cpu.
 
+config KMEMTRACE
+	bool "Trace SLAB allocations"
+	select TRACING
+	depends on RELAY
+	help
+	  kmemtrace provides tracing for slab allocator functions, such as
+	  kmalloc, kfree, kmem_cache_alloc, kmem_cache_free etc.. Collected
+	  data is then fed to the userspace application in order to analyse
+	  allocation hotspots, internal fragmentation and so on, making it
+	  possible to see how well an allocator performs, as well as debug
+	  and profile kernel code.
+
+	  This requires an userspace application to use. See
+	  Documentation/vm/kmemtrace.txt for more information.
+
+	  Saying Y will make the kernel somewhat larger and slower. However,
+	  if you disable kmemtrace at run-time or boot-time, the performance
+	  impact is minimal (depending on the arch the kernel is built for).
+
+	  If unsure, say N.
+
+
 config DYNAMIC_FTRACE
 	bool "enable/disable ftrace tracepoints dynamically"
 	depends on FUNCTION_TRACER

diff --git a/trunk/kernel/trace/Makefile b/trunk/kernel/trace/Makefile
@@ -33,5 +33,6 @@ obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += trace_functions_graph.o
 obj-$(CONFIG_TRACE_BRANCH_PROFILING) += trace_branch.o
 obj-$(CONFIG_HW_BRANCH_TRACER) += trace_hw_branches.o
 obj-$(CONFIG_POWER_TRACER) += trace_power.o
+obj-$(CONFIG_KMEMTRACE) += kmemtrace.o
 
 libftrace-y := ftrace.o