Skip to content
体验新版
项目
组织
正在加载...
登录
切换导航
打开侧边栏
openanolis
cloud-kernel
提交
cbb5901b
cloud-kernel
项目概览
openanolis
/
cloud-kernel
大约 1 年 前同步成功
通知
158
Star
36
Fork
7
代码
文件
提交
分支
Tags
贡献者
分支图
Diff
Issue
10
列表
看板
标记
里程碑
合并请求
2
Wiki
0
Wiki
分析
仓库
DevOps
项目成员
Pages
cloud-kernel
项目概览
项目概览
详情
发布
仓库
仓库
文件
提交
分支
标签
贡献者
分支图
比较
Issue
10
Issue
10
列表
看板
标记
里程碑
合并请求
2
合并请求
2
Pages
分析
分析
仓库分析
DevOps
Wiki
0
Wiki
成员
成员
收起侧边栏
关闭侧边栏
动态
分支图
创建新Issue
提交
Issue看板
体验新版 GitCode,发现更多精彩内容 >>
提交
cbb5901b
编写于
2月 02, 2009
作者:
J
Jens Axboe
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
block: add text file detailing queue/ sysfs files
Signed-off-by:
N
Jens Axboe
<
jens.axboe@oracle.com
>
上级
c52440a6
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
63 addition
and
0 deletion
+63
-0
Documentation/block/queue-sysfs.txt
Documentation/block/queue-sysfs.txt
+63
-0
未找到文件。
Documentation/block/queue-sysfs.txt
0 → 100644
浏览文件 @
cbb5901b
Queue sysfs files
=================
This text file will detail the queue files that are located in the sysfs tree
for each block device. Note that stacked devices typically do not export
any settings, since their queue merely functions are a remapping target.
These files are the ones found in the /sys/block/xxx/queue/ directory.
Files denoted with a RO postfix are readonly and the RW postfix means
read-write.
hw_sector_size (RO)
-------------------
This is the hardware sector size of the device, in bytes.
max_hw_sectors_kb (RO)
----------------------
This is the maximum number of kilobytes supported in a single data transfer.
max_sectors_kb (RW)
-------------------
This is the maximum number of kilobytes that the block layer will allow
for a filesystem request. Must be smaller than or equal to the maximum
size allowed by the hardware.
nomerges (RW)
-------------
This enables the user to disable the lookup logic involved with IO merging
requests in the block layer. Merging may still occur through a direct
1-hit cache, since that comes for (almost) free. The IO scheduler will not
waste cycles doing tree/hash lookups for merges if nomerges is 1. Defaults
to 0, enabling all merges.
nr_requests (RW)
----------------
This controls how many requests may be allocated in the block layer for
read or write requests. Note that the total allocated number may be twice
this amount, since it applies only to reads or writes (not the accumulated
sum).
read_ahead_kb (RW)
------------------
Maximum number of kilobytes to read-ahead for filesystems on this block
device.
rq_affinity (RW)
----------------
If this option is enabled, the block layer will migrate request completions
to the CPU that originally submitted the request. For some workloads
this provides a significant reduction in CPU cycles due to caching effects.
scheduler (RW)
--------------
When read, this file will display the current and available IO schedulers
for this block device. The currently active IO scheduler will be enclosed
in [] brackets. Writing an IO scheduler name to this file will switch
control of this block device to that new IO scheduler. Note that writing
an IO scheduler name to this file will attempt to load that IO scheduler
module, if it isn't already present in the system.
Jens Axboe <jens.axboe@oracle.com>, February 2009
编辑
预览
Markdown
is supported
0%
请重试
或
添加新附件
.
添加附件
取消
You are about to add
0
people
to the discussion. Proceed with caution.
先完成此消息的编辑!
取消
想要评论请
注册
或
登录