1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
From c75ae0f6ac2bb9eb893cce82e93144e1b3c36389 Mon Sep 17 00:00:00 2001
From: Qi Hou <qi.hou@windriver.com>
Date: Wed, 16 Mar 2016 05:44:40 +0000
Subject: [PATCH] schedtool-dl: add flags to parameters of sched_setattr
git://github.com/jlelli/schedtool-dl.git;protocol=git
commit 3ffb479929c31cbae09de08f94f58b8f0f061d91
The commit numbered as 3ffb479 has adapted to the very last changes to the ABI,except for the
syscall of sched_setattr.
While executing schedtool,there was an error,like below:
root@128:/opt/wr-test/testcases/kts/edf# schedtool -E -t 8000:10000 -e yes
ERROR: could not set PID 1731 to E: SCHED_DEADLINE - value out of range / policy not implemented
The cause of this case is that the syscall of sched_setattr is declared with 3 parameters,but in
the use of it in schedtool,there was only two parameters.So to adapt this declaration,we should
add one more parameter,flags,when calling sched_setattr.
In kernel source file kernel/sched/core.c,the declaration of the syscall of sched_setattr like below:
/**
* sys_sched_setattr - same as above, but with extended sched_attr
* @pid: the pid in question.
* @uattr: structure containing the extended parameters.
* @flags: for future extension.
*/
SYSCALL_DEFINE3(sched_setattr, pid_t, pid, struct sched_attr __user *, uattr,
unsigned int, flags)
{
...
}
In schedtool-dl source file syscall_magic.h,the use of sched_setattr like below:
syscall(__NR_sched_setattr, pid, attr)
Upstream-Status: Backport
Signed-off-by: Qi Hou <qi.hou@windriver.com>
---
syscall_magic.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/syscall_magic.h b/syscall_magic.h
index 7dcb967..2735dfb 100644
--- a/syscall_magic.h
+++ b/syscall_magic.h
@@ -76,4 +76,4 @@ struct sched_attr {
syscall(__NR_sched_getattr, pid, attr, size, flags)
#define sched_setattr(pid, attr, flags) \
- syscall(__NR_sched_setattr, pid, attr)
+ syscall(__NR_sched_setattr, pid, attr,flags)
--
1.9.1
|
