aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--block/Kconfig24
-rw-r--r--block/Makefile1
-rw-r--r--kernel/trace/Kconfig23
-rw-r--r--kernel/trace/Makefile1
-rw-r--r--kernel/trace/blktrace.c (renamed from block/blktrace.c)2
5 files changed, 25 insertions, 26 deletions
diff --git a/block/Kconfig b/block/Kconfig
index 7cdaa1d72252..e7d12782bcfb 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -44,30 +44,6 @@ config LBD
44 44
45 If unsure, say N. 45 If unsure, say N.
46 46
47config BLK_DEV_IO_TRACE
48 bool "Support for tracing block io actions"
49 depends on SYSFS
50 select RELAY
51 select DEBUG_FS
52 select TRACEPOINTS
53 select TRACING
54 select STACKTRACE
55 help
56 Say Y here if you want to be able to trace the block layer actions
57 on a given queue. Tracing allows you to see any traffic happening
58 on a block device queue. For more information (and the userspace
59 support tools needed), fetch the blktrace tools from:
60
61 git://git.kernel.dk/blktrace.git
62
63 Tracing also is possible using the ftrace interface, e.g.:
64
65 echo 1 > /sys/block/sda/sda1/trace/enable
66 echo blk > /sys/kernel/debug/tracing/current_tracer
67 cat /sys/kernel/debug/tracing/trace_pipe
68
69 If unsure, say N.
70
71config BLK_DEV_BSG 47config BLK_DEV_BSG
72 bool "Block layer SG support v4 (EXPERIMENTAL)" 48 bool "Block layer SG support v4 (EXPERIMENTAL)"
73 depends on EXPERIMENTAL 49 depends on EXPERIMENTAL
diff --git a/block/Makefile b/block/Makefile
index bfe73049f939..e9fa4dd690f2 100644
--- a/block/Makefile
+++ b/block/Makefile
@@ -13,6 +13,5 @@ obj-$(CONFIG_IOSCHED_AS) += as-iosched.o
13obj-$(CONFIG_IOSCHED_DEADLINE) += deadline-iosched.o 13obj-$(CONFIG_IOSCHED_DEADLINE) += deadline-iosched.o
14obj-$(CONFIG_IOSCHED_CFQ) += cfq-iosched.o 14obj-$(CONFIG_IOSCHED_CFQ) += cfq-iosched.o
15 15
16obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
17obj-$(CONFIG_BLOCK_COMPAT) += compat_ioctl.o 16obj-$(CONFIG_BLOCK_COMPAT) += compat_ioctl.o
18obj-$(CONFIG_BLK_DEV_INTEGRITY) += blk-integrity.o 17obj-$(CONFIG_BLK_DEV_INTEGRITY) += blk-integrity.o
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 25131a5d5e4f..4fee43c01942 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -302,6 +302,29 @@ config WORKQUEUE_TRACER
302 For example it can help a developer to decide whether he should 302 For example it can help a developer to decide whether he should
303 choose a per cpu workqueue instead of a singlethreaded one. 303 choose a per cpu workqueue instead of a singlethreaded one.
304 304
305config BLK_DEV_IO_TRACE
306 bool "Support for tracing block io actions"
307 depends on SYSFS
308 select RELAY
309 select DEBUG_FS
310 select TRACEPOINTS
311 select TRACING
312 select STACKTRACE
313 help
314 Say Y here if you want to be able to trace the block layer actions
315 on a given queue. Tracing allows you to see any traffic happening
316 on a block device queue. For more information (and the userspace
317 support tools needed), fetch the blktrace tools from:
318
319 git://git.kernel.dk/blktrace.git
320
321 Tracing also is possible using the ftrace interface, e.g.:
322
323 echo 1 > /sys/block/sda/sda1/trace/enable
324 echo blk > /sys/kernel/debug/tracing/current_tracer
325 cat /sys/kernel/debug/tracing/trace_pipe
326
327 If unsure, say N.
305 328
306config DYNAMIC_FTRACE 329config DYNAMIC_FTRACE
307 bool "enable/disable ftrace tracepoints dynamically" 330 bool "enable/disable ftrace tracepoints dynamically"
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index f76d48f3527d..627090bc262d 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -37,5 +37,6 @@ obj-$(CONFIG_HW_BRANCH_TRACER) += trace_hw_branches.o
37obj-$(CONFIG_POWER_TRACER) += trace_power.o 37obj-$(CONFIG_POWER_TRACER) += trace_power.o
38obj-$(CONFIG_KMEMTRACE) += kmemtrace.o 38obj-$(CONFIG_KMEMTRACE) += kmemtrace.o
39obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o 39obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o
40obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
40 41
41libftrace-y := ftrace.o 42libftrace-y := ftrace.o
diff --git a/block/blktrace.c b/kernel/trace/blktrace.c
index ca6d32061e4f..3b91da064820 100644
--- a/block/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -25,7 +25,7 @@
25#include <linux/time.h> 25#include <linux/time.h>
26#include <trace/block.h> 26#include <trace/block.h>
27#include <linux/uaccess.h> 27#include <linux/uaccess.h>
28#include <../kernel/trace/trace_output.h> 28#include "trace_output.h"
29 29
30static unsigned int blktrace_seq __read_mostly = 1; 30static unsigned int blktrace_seq __read_mostly = 1;
31 31