Changed checkfs to auto reboot after correctable fsck fixes.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.25 / patches.trace / lttng-instrumentation-page_alloc.patch

From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Subject: LTTng instrumentation - page_alloc

Original patch header:
  LTTng instrumentation - page_alloc
  
  Paging activity instrumentation. Instruments page allocation/free to keep track
  of page allocation. This does not cover hugetlb activity, which is covered by a
  separate patch.
  
  Those tracepoints are used by LTTng.
  
  About the performance impact of tracepoints (which is comparable to markers),
  even without immediate values optimizations, tests done by Hideo Aoki on ia64
  show no regression. His test case was using hackbench on a kernel where
  scheduler instrumentation (about 5 events in code scheduler code) was added.
  See the "Tracepoints" patch header for performance result detail.
  
  Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
  CC: Martin Bligh <mbligh@google.com>
  CC: Masami Hiramatsu <mhiramat@redhat.com>
  CC: 'Peter Zijlstra' <peterz@infradead.org>
  CC: "Frank Ch. Eigler" <fche@redhat.com>
  CC: 'Ingo Molnar' <mingo@elte.hu>
  CC: 'Hideo AOKI' <haoki@redhat.com>
  CC: Takashi Nishiie <t-nishiie@np.css.fujitsu.com>
  CC: 'Steven Rostedt' <rostedt@goodmis.org>
  CC: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>

Acked-by: Jan Blunck <jblunck@suse.de>
--- 
---
 include/trace/page_alloc.h |   16 ++++++++++++++++
 mm/page_alloc.c            |    7 +++++++
 2 files changed, 23 insertions(+)

--- /dev/null
+++ b/include/trace/page_alloc.h
@@ -0,0 +1,16 @@
+#ifndef _TRACE_PAGE_ALLOC_H
+#define _TRACE_PAGE_ALLOC_H
+
+#include <linux/tracepoint.h>
+
+/*
+ * mm_page_alloc : page can be NULL.
+ */
+DEFINE_TRACE(page_alloc,
+	TPPROTO(struct page *page, unsigned int order),
+	TPARGS(page, order));
+DEFINE_TRACE(page_free,
+	TPPROTO(struct page *page, unsigned int order),
+	TPARGS(page, order));
+
+#endif
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -51,6 +51,8 @@
 #include <asm/div64.h>
 #include "internal.h"
 
+#include <trace/page_alloc.h>
+
 /*
  * Array of node states.
  */
@@ -528,6 +530,8 @@ static void __free_pages_ok(struct page 
 	int i;
 	int reserved = 0;
 
+	trace_page_free(page, order);
+
 	for (i = 0 ; i < (1 << order) ; ++i)
 		reserved += free_pages_check(page + i);
 	if (reserved)
@@ -988,6 +992,8 @@ static void free_hot_cold_page(struct pa
 	struct per_cpu_pages *pcp;
 	unsigned long flags;
 
+	trace_page_free(page, 0);
+
 	if (PageAnon(page))
 		page->mapping = NULL;
 	if (free_pages_check(page))
@@ -1658,6 +1664,7 @@ nopage:
 		show_mem();
 	}
 got_pg:
+	trace_page_alloc(page, order);
 	return page;
 }
 EXPORT_SYMBOL(__alloc_pages_internal);