From: Peter Zijlstra <peterz@infradead.org>
To: Darren Hart <dvhart@linux.intel.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>,
richard.purdie@linuxfoundation.org
Subject: Re: [PATCH 2/2] sched: allow users with rtprio rlimit to change from SCHED_IDLE policy
Date: Wed, 23 Feb 2011 12:03:09 +0100 [thread overview]
Message-ID: <1298458989.2217.361.camel@twins> (raw)
In-Reply-To: <1298408674-3130-3-git-send-email-dvhart@linux.intel.com>
On Tue, 2011-02-22 at 13:04 -0800, Darren Hart wrote:
> As it stands, users with rtprio rlimit permissions can change their policy from
> SCHED_OTHER to SCHED_FIFO and back. They can change to SCHED_IDLE, but not back
> to SCHED_FIFO. If they have the rtprio permission, they should be able to. Once
> in SCHED_FIFO, they could go back to SCHED_OTHER. This patch allows users with
> rtprio permission to change out of SCHED_IDLE.
>
Ingo, can you remember the rationale for this?
The fact is that SCHED_IDLE is very near nice-20, and we can do:
peterz@twins:~$ renice 5 -p $$
1867: old priority 0, new priority 5
peterz@twins:~$ renice 0 -p $$
1867: old priority 5, new priority 0
Which would suggest that we should be able to return to SCHED_OTHER
RLIMIT_NICE-20.
Hmm?
next prev parent reply other threads:[~2011-02-23 11:03 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-22 21:04 [PATCH 0/2] sched: SCHED_BATCH fixes Darren Hart
2011-02-22 21:04 ` [PATCH 1/2] sched: allow SCHED_BATCH to preempt SCHED_IDLE tasks Darren Hart
2011-02-23 4:20 ` Mike Galbraith
2011-02-23 5:31 ` Mike Galbraith
2011-02-23 5:33 ` Darren Hart
2011-03-04 11:49 ` [tip:sched/core] sched: Allow " tip-bot for Darren Hart
2011-02-22 21:04 ` [PATCH 2/2] sched: allow users with rtprio rlimit to change from SCHED_IDLE policy Darren Hart
2011-02-23 11:03 ` Peter Zijlstra [this message]
2011-02-23 11:13 ` Ingo Molnar
2011-02-23 11:17 ` Peter Zijlstra
2011-02-23 11:35 ` Ingo Molnar
2011-02-23 15:52 ` Darren Hart
2011-02-23 16:00 ` Peter Zijlstra
2011-02-23 16:07 ` Darren Hart
2011-02-23 21:28 ` Darren Hart
2011-02-24 11:49 ` Peter Zijlstra
2011-03-04 11:49 ` [tip:sched/core] sched: Allow users with sufficient RLIMIT_NICE " tip-bot for Darren Hart
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1298458989.2217.361.camel@twins \
--to=peterz@infradead.org \
--cc=dvhart@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=richard.purdie@linuxfoundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.