6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yanteng Si <siyanteng@xxxxxxxxxxx>
[ Upstream commit 6ab587e8e8b434ffc2decdd6db17dff0ef2b13ab ]
Update to commit f347c9d2697f ("filemap: make the accounting
of thrashing more consistent").
Commit 662ce1dc9caf ("delayacct: track delays from write-protect copy").
Signed-off-by: Yanteng Si <siyanteng@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/798990521e991697f9f2b75f4dc4a485d31c1311.1670642548.git.siyanteng@xxxxxxxxxxx
Signed-off-by: Jonathan Corbet <corbet@xxxxxxx>
Stable-dep-of: 3840cbe24cf0 ("sched: psi: fix bogus pressure spikes from aggregation race")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
.../translations/zh_CN/accounting/delay-accounting.rst | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/Documentation/translations/zh_CN/accounting/delay-accounting.rst b/Documentation/translations/zh_CN/accounting/delay-accounting.rst
index f1849411018e9..a01dc3d5b0dbb 100644
--- a/Documentation/translations/zh_CN/accounting/delay-accounting.rst
+++ b/Documentation/translations/zh_CN/accounting/delay-accounting.rst
@@ -17,8 +17,9 @@ a) 等待一个CPU（任务为可运行）
b) 完成由该任务发起的块I/O同步请求
c) 页面交换
d) 内存回收
-e) 页缓存抖动
+e) 抖动
f) 直接规整
+g) 写保护复制
并将这些统计信息通过taskstats接口提供给用户空间。
@@ -42,7 +43,7 @@ f) 直接规整
include/uapi/linux/taskstats.h
其描述了延时计数相关字段。系统通常以计数器形式返回 CPU、同步块 I/O、交换、内存
-回收、页缓存抖动、直接规整等的累积延时。
+回收、页缓存抖动、直接规整、写保护复制等的累积延时。
取任务某计数器两个连续读数的差值，将得到任务在该时间间隔内等待对应资源的总延时。
@@ -100,6 +101,8 @@ getdelays命令的一般格式::
0 0 0ms
COMPACT count delay total delay average
0 0 0ms
+ WPCOPY count delay total delay average
+ 0 0 0ms
获取pid为1的IO计数，它只和-p一起使用::
# ./getdelays -i -p 1
--
2.43.0
