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1, /proc/sys/dev/raid
两项,speed_limit_max speed_limit_min
RAID1, RAID5, RAID6需要初始化同步RAID的同步速度限制
通过register_sysctl_table接口实现
相关结构体:
static ctl_table raid_table[] = {
{
.ctl_name = DEV_RAID_SPEED_LIMIT_MIN,
.procname = "speed_limit_min",
.data = &sysctl_speed_limit_min,
.maxlen = sizeof(int),
.mode = S_IRUGO|S_IWUSR,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = DEV_RAID_SPEED_LIMIT_MAX,
.procname = "speed_limit_max",
.data = &sysctl_speed_limit_max,
.maxlen = sizeof(int),
.mode = S_IRUGO|S_IWUSR,
.proc_handler = &proc_dointvec,
},
{ .ctl_name = 0 }
};
static ctl_table raid_dir_table[] = {
{
.ctl_name = DEV_RAID,
.procname = "raid",
.maxlen = 0,
.mode = S_IRUGO|S_IXUGO,
.child = raid_table,
},
{ .ctl_name = 0 }
};
static ctl_table raid_root_table[] = {
{
.ctl_name = CTL_DEV,
.procname = "dev",
.maxlen = 0,
.mode = 0555,
.child = raid_dir_table,
},
{ .ctl_name = 0 }
};
2, /sys/block/md[minor]
RAID调控参数,RAID5缓存大小等重要参数可以从这里调控(见于2.6较新版本)
通过sysfs_create_group接口实现
相关结构体:
static struct attribute *raid5_attrs[] = {
&raid5_stripecache_size.attr,
&raid5_stripecache_active.attr,
&raid5_preread_bypass_threshold.attr,
NULL,
};
static struct attribute_group raid5_attrs_group = {
.name = NULL,
.attrs = raid5_attrs,
};
本文来自ChinaUnix博客,如果查看原文请点:http://blog.chinaunix.net/u2/84444/showart_1803794.html |
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