* [PATCH] sched_setattr.2: callee's affinity matters, not caller's one.
@ 2016-01-02 13:04 Akihiro Suda
[not found] ` <CAG8fp8Sn2rRBxHPvpgU-k_XGDfEkZsKcopm8k9udajm_xGzARA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
0 siblings, 1 reply; 3+ messages in thread
From: Akihiro Suda @ 2016-01-02 13:04 UTC (permalink / raw)
To: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w; +Cc: linux-man-u79uwXL29TY76Z2rM5mHXA
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Hi, all
sched_setattr.2 says:
EPERM The caller's CPU affinity mask does not include all CPUs in
the system (see sched_setaffinity(2)).
But it seems that callee's affinity matters, not caller's one.
http://lxr.free-electrons.com/source/kernel/sched/core.c?v=4.3#L3888
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From f2bd53237444dc2c318526c6a9ba0abc447577dc Mon Sep 17 00:00:00 2001
From: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
Date: Sat, 2 Jan 2016 21:51:28 +0900
Subject: [PATCH] sched_setattr.2: callee's affinity matters, not caller's one.
http://lxr.free-electrons.com/source/kernel/sched/core.c?v=4.3#L3888
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
---
man2/sched_setattr.2 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/man2/sched_setattr.2 b/man2/sched_setattr.2
index c411f01..ce6d337 100644
--- a/man2/sched_setattr.2
+++ b/man2/sched_setattr.2
@@ -341,7 +341,7 @@ are invalid.
The caller does not have appropriate privileges.
.TP
.B EPERM
-The caller's CPU affinity mask
+The callee's CPU affinity mask
does not include all CPUs in the system
(see
.BR sched_setaffinity (2)).
--
2.5.4 (Apple Git-61)
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] sched_setattr.2: callee's affinity matters, not caller's one.
[not found] ` <CAG8fp8Sn2rRBxHPvpgU-k_XGDfEkZsKcopm8k9udajm_xGzARA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
@ 2016-01-08 20:27 ` Michael Kerrisk (man-pages)
[not found] ` <56901BC5.4060708-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
0 siblings, 1 reply; 3+ messages in thread
From: Michael Kerrisk (man-pages) @ 2016-01-08 20:27 UTC (permalink / raw)
To: Akihiro Suda
Cc: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w, linux-man-u79uwXL29TY76Z2rM5mHXA
Hello Akihiro,
On 01/02/2016 02:04 PM, Akihiro Suda wrote:
> Hi, all
>
> sched_setattr.2 says:
>
> EPERM The caller's CPU affinity mask does not include all CPUs in
> the system (see sched_setaffinity(2)).
>
>
> But it seems that callee's affinity matters, not caller's one.
> http://lxr.free-electrons.com/source/kernel/sched/core.c?v=4.3#L3888
I agree with you. But I think we can word a little more precisely,
since "callee" isn't so clear. I applied the patch below. Thanks!
Cheers,
Michael
-- a/man2/sched_setattr.2
+++ b/man2/sched_setattr.2
@@ -341,7 +341,8 @@ are invalid.
The caller does not have appropriate privileges.
.TP
.B EPERM
-The caller's CPU affinity mask
+The CPU affinity mask of the thread specified by
+.I pid
does not include all CPUs in the system
(see
.BR sched_setaffinity (2)).
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] sched_setattr.2: callee's affinity matters, not caller's one.
[not found] ` <56901BC5.4060708-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
@ 2016-01-10 10:18 ` Akihiro Suda
0 siblings, 0 replies; 3+ messages in thread
From: Akihiro Suda @ 2016-01-10 10:18 UTC (permalink / raw)
To: Michael Kerrisk (man-pages); +Cc: linux-man-u79uwXL29TY76Z2rM5mHXA
Hello Michael,
OK, and thanks!
2016-01-09 5:27 GMT+09:00 Michael Kerrisk (man-pages) <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>:
> Hello Akihiro,
>
> On 01/02/2016 02:04 PM, Akihiro Suda wrote:
>> Hi, all
>>
>> sched_setattr.2 says:
>>
>> EPERM The caller's CPU affinity mask does not include all CPUs in
>> the system (see sched_setaffinity(2)).
>>
>>
>> But it seems that callee's affinity matters, not caller's one.
>> http://lxr.free-electrons.com/source/kernel/sched/core.c?v=4.3#L3888
>
> I agree with you. But I think we can word a little more precisely,
> since "callee" isn't so clear. I applied the patch below. Thanks!
>
> Cheers,
>
> Michael
>
> -- a/man2/sched_setattr.2
> +++ b/man2/sched_setattr.2
> @@ -341,7 +341,8 @@ are invalid.
> The caller does not have appropriate privileges.
> .TP
> .B EPERM
> -The caller's CPU affinity mask
> +The CPU affinity mask of the thread specified by
> +.I pid
> does not include all CPUs in the system
> (see
> .BR sched_setaffinity (2)).
>
>
> --
> Michael Kerrisk
> Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
> Linux/UNIX System Programming Training: http://man7.org/training/
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2016-01-02 13:04 [PATCH] sched_setattr.2: callee's affinity matters, not caller's one Akihiro Suda
[not found] ` <CAG8fp8Sn2rRBxHPvpgU-k_XGDfEkZsKcopm8k9udajm_xGzARA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-01-08 20:27 ` Michael Kerrisk (man-pages)
[not found] ` <56901BC5.4060708-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2016-01-10 10:18 ` Akihiro Suda
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