[patch] sreadahead-manual.patch

sreadahead-manual.patch (text/plain), 1.82 KB, created by Auke Booij (tulcod) on 2009-02-01 13:06:04 UTC

diff --git a/fs/open.c b/fs/open.c
index ef64264..f22ce03 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -30,6 +30,8 @@
 #include <linux/audit.h>
 #include <linux/falloc.h>
 
+#include <trace/fs.h>
+
 int vfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	int retval = -ENODEV;
@@ -1039,6 +1041,7 @@ long do_sys_open(int dfd, const char __user *filename, int flags, int mode)
 			} else {
 				fsnotify_open(f->f_path.dentry);
 				fd_install(fd, f);
+				trace_do_sys_open(f, flags, mode, fd);
 			}
 		}
 		putname(tmp);
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 33dbefd..30ba7cf 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -119,6 +119,15 @@ config CONTEXT_SWITCH_TRACER
 	  This tracer gets called from the context switch and records
 	  all switching of tasks.
 
+config OPEN_TRACER
+	bool "Trace open() calls"
+	depends on DEBUG_KERNEL
+	select TRACING
+	select MARKERS
+	help
+	  This tracer records open() syscalls. These calls are made when
+	  files are accessed on disk.
+
 config BOOT_TRACER
 	bool "Trace boot initcalls"
 	depends on DEBUG_KERNEL
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index c8228b1..254ac10 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_RING_BUFFER) += ring_buffer.o
 
 obj-$(CONFIG_TRACING) += trace.o
 obj-$(CONFIG_CONTEXT_SWITCH_TRACER) += trace_sched_switch.o
+obj-$(CONFIG_OPEN_TRACER) += trace_open.o
 obj-$(CONFIG_SYSPROF_TRACER) += trace_sysprof.o
 obj-$(CONFIG_FUNCTION_TRACER) += trace_functions.o
 obj-$(CONFIG_IRQSOFF_TRACER) += trace_irqsoff.o
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 8465ad0..f2618fe 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -22,6 +22,7 @@ enum trace_type {
 	TRACE_MMIO_RW,
 	TRACE_MMIO_MAP,
 	TRACE_BOOT,
+	TRACE_OPEN,
 
 	__TRACE_LAST_TYPE
 };