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authorRobert Richter <robert.richter@amd.com>2008-12-09 16:56:01 +0100
committerRobert Richter <robert.richter@amd.com>2008-12-10 14:20:10 +0100
commit37ca5eb341711d7aeb9f296873b9d46eb6af33ec (patch)
treee8d3a5003a90a7cdbc8da9835f8936c05820e85a /drivers/oprofile
parentfd7826d56bde11ab142d2431093773ad2b3f0a59 (diff)
oprofile: set values to default when creating oprofilefs
This patch restores default values for: /dev/oprofile/cpu_buffer_size /dev/oprofile/buffer_watershed /dev/oprofile/buffer_size when creating the oprofilefs: # opcontrol --deinit # opcontrol --init # cat /dev/oprofile/cpu_buffer_size 8192 # echo 5123 > /dev/oprofile/cpu_buffer_size # cat /dev/oprofile/cpu_buffer_size 5123 # opcontrol --deinit # opcontrol --init # cat /dev/oprofile/cpu_buffer_size 8192 # opcontrol --deinit This sets the values in a defined state. Before, there was no way to restore the defaults without rebooting the system or reloading the module. Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'drivers/oprofile')
-rw-r--r--drivers/oprofile/oprofile_files.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/oprofile/oprofile_files.c b/drivers/oprofile/oprofile_files.c
index cc106d503ac..d8201998b0b 100644
--- a/drivers/oprofile/oprofile_files.c
+++ b/drivers/oprofile/oprofile_files.c
@@ -14,9 +14,13 @@
#include "oprofile_stats.h"
#include "oprof.h"
-unsigned long fs_buffer_size = 131072;
-unsigned long fs_cpu_buffer_size = 8192;
-unsigned long fs_buffer_watershed = 32768; /* FIXME: tune */
+#define FS_BUFFER_SIZE_DEFAULT 131072
+#define FS_CPU_BUFFER_SIZE_DEFAULT 8192
+#define FS_BUFFER_WATERSHED_DEFAULT 32768 /* FIXME: tune */
+
+unsigned long fs_buffer_size;
+unsigned long fs_cpu_buffer_size;
+unsigned long fs_buffer_watershed;
static ssize_t depth_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
{
@@ -120,6 +124,11 @@ static const struct file_operations dump_fops = {
void oprofile_create_files(struct super_block *sb, struct dentry *root)
{
+ /* reinitialize default values */
+ fs_buffer_size = FS_BUFFER_SIZE_DEFAULT;
+ fs_cpu_buffer_size = FS_CPU_BUFFER_SIZE_DEFAULT;
+ fs_buffer_watershed = FS_BUFFER_WATERSHED_DEFAULT;
+
oprofilefs_create_file(sb, root, "enable", &enable_fops);
oprofilefs_create_file_perm(sb, root, "dump", &dump_fops, 0666);
oprofilefs_create_file(sb, root, "buffer", &event_buffer_fops);