linux-kernel - [PATCH V2 1/7] trace/events: Add gup trace events

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1449096813-22436-2-git-send-email-yang.shi@linaro.org>
Date:	Wed,  2 Dec 2015 14:53:27 -0800
From:	Yang Shi <yang.shi@...aro.org>
To:	akpm@...ux-foundation.org, rostedt@...dmis.org, mingo@...hat.com
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linaro-kernel@...ts.linaro.org, yang.shi@...aro.org
Subject: [PATCH V2 1/7] trace/events: Add gup trace events

page-faults events record the invoke to handle_mm_fault, but the invoke
may come from do_page_fault or gup. In some use cases, the finer event count
mey be needed, so add trace events support for:

__get_user_pages
__get_user_pages_fast
fixup_user_fault

Signed-off-by: Yang Shi <yang.shi@...aro.org>
---
 include/trace/events/gup.h | 71 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 include/trace/events/gup.h

diff --git a/include/trace/events/gup.h b/include/trace/events/gup.h
new file mode 100644
index 0000000..03a4674
--- /dev/null
+++ b/include/trace/events/gup.h
@@ -0,0 +1,71 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM gup
+
+#if !defined(_TRACE_GUP_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_GUP_H
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(gup_fixup_user_fault,
+
+	TP_PROTO(struct task_struct *tsk, struct mm_struct *mm,
+			unsigned long address, unsigned int fault_flags),
+
+	TP_ARGS(tsk, mm, address, fault_flags),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	address		)
+	),
+
+	TP_fast_assign(
+		__entry->address	= address;
+	),
+
+	TP_printk("address=%lx",  __entry->address)
+);
+
+TRACE_EVENT(gup_get_user_pages,
+
+	TP_PROTO(struct task_struct *tsk, struct mm_struct *mm,
+			unsigned long start, unsigned long nr_pages),
+
+	TP_ARGS(tsk, mm, start, nr_pages),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	start		)
+		__field(	unsigned long,	nr_pages	)
+	),
+
+	TP_fast_assign(
+		__entry->start		= start;
+		__entry->nr_pages	= nr_pages;
+	),
+
+	TP_printk("start=%lx nr_pages=%lu", __entry->start, __entry->nr_pages)
+);
+
+TRACE_EVENT(gup_get_user_pages_fast,
+
+	TP_PROTO(unsigned long start, int nr_pages, int write,
+			struct page **pages),
+
+	TP_ARGS(start, nr_pages, write, pages),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	start		)
+		__field(	unsigned long,	nr_pages	)
+	),
+
+	TP_fast_assign(
+		__entry->start  	= start;
+		__entry->nr_pages	= nr_pages;
+	),
+
+	TP_printk("start=%lx nr_pages=%lu",  __entry->start, __entry->nr_pages)
+);
+
+#endif /* _TRACE_GUP_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
-- 
2.0.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/