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Commit 37ca5eb3 authored by Robert Richter's avatar Robert Richter
Browse files

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: default avatarRobert Richter <robert.richter@amd.com>
parent fd7826d5

drivers/oprofile/oprofile_files.c

+12 −3
Original line number Diff line number Diff line
@@ -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);