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e25ff11f
cloud-kernel
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体验新版 GitCode,发现更多精彩内容 >>
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e25ff11f
编写于
5月 07, 2014
作者:
A
Al Viro
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
split the slow path in acct_process() off
Signed-off-by:
N
Al Viro
<
viro@zeniv.linux.org.uk
>
上级
cdd37e23
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
28 addition
and
22 deletion
+28
-22
kernel/acct.c
kernel/acct.c
+28
-22
未找到文件。
kernel/acct.c
浏览文件 @
e25ff11f
...
@@ -599,34 +599,35 @@ void acct_collect(long exitcode, int group_dead)
...
@@ -599,34 +599,35 @@ void acct_collect(long exitcode, int group_dead)
spin_unlock_irq
(
&
current
->
sighand
->
siglock
);
spin_unlock_irq
(
&
current
->
sighand
->
siglock
);
}
}
static
void
acct_process_in_n
s
(
struct
pid_namespace
*
ns
)
static
void
slow_acct_proces
s
(
struct
pid_namespace
*
ns
)
{
{
struct
file
*
file
=
NULL
;
for
(
;
ns
;
ns
=
ns
->
parent
)
{
struct
bsd_acct_struct
*
acct
;
struct
file
*
file
=
NULL
;
struct
bsd_acct_struct
*
acct
;
acct
=
ns
->
bacct
;
acct
=
ns
->
bacct
;
/*
/*
* accelerate the common fastpath:
* accelerate the common fastpath:
*/
*/
if
(
!
acct
||
!
acct
->
file
)
if
(
!
acct
||
!
acct
->
file
)
return
;
continue
;
spin_lock
(
&
acct_lock
);
spin_lock
(
&
acct_lock
);
file
=
acct
->
file
;
file
=
acct
->
file
;
if
(
unlikely
(
!
file
))
{
if
(
unlikely
(
!
file
))
{
spin_unlock
(
&
acct_lock
);
continue
;
}
get_file
(
file
);
spin_unlock
(
&
acct_lock
);
spin_unlock
(
&
acct_lock
);
return
;
}
get_file
(
file
);
spin_unlock
(
&
acct_lock
);
do_acct_process
(
acct
,
ns
,
file
);
do_acct_process
(
acct
,
ns
,
file
);
fput
(
file
);
fput
(
file
);
}
}
}
/**
/**
* acct_process - now just a wrapper around acct_process_in_ns,
* acct_process
* which in turn is a wrapper around do_acct_process.
*
*
* handles process accounting for an exiting task
* handles process accounting for an exiting task
*/
*/
...
@@ -639,6 +640,11 @@ void acct_process(void)
...
@@ -639,6 +640,11 @@ void acct_process(void)
* alive and holds its namespace, which in turn holds
* alive and holds its namespace, which in turn holds
* its parent.
* its parent.
*/
*/
for
(
ns
=
task_active_pid_ns
(
current
);
ns
!=
NULL
;
ns
=
ns
->
parent
)
for
(
ns
=
task_active_pid_ns
(
current
);
ns
!=
NULL
;
ns
=
ns
->
parent
)
{
acct_process_in_ns
(
ns
);
struct
bsd_acct_struct
*
acct
=
ns
->
bacct
;
if
(
acct
&&
acct
->
file
)
break
;
}
if
(
unlikely
(
ns
))
slow_acct_process
(
ns
);
}
}
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