linux-kernel - Re: [Question] sched: migrate RT task on throttled leaf RT runqueue?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1310652552.27864.25.camel@gandalf.stny.rr.com>
Date:	Thu, 14 Jul 2011 10:09:12 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Hillf Danton <dhillf@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Question] sched: migrate RT task on throttled leaf RT
 runqueue?

On Thu, 2011-07-14 at 21:43 +0800, Hillf Danton wrote:
> Hi Steven
> 
> When a non-boosted RT task is enqueued, if it is attached to task group, as
> shown in the following diff format for clarity, and even if the RT runqueue
> owned by the task group is throttled, the rt_rq is loaded up as leaf and the
> task is added to pushable list if it is pushable.
> 
> Since RT tasks on throttled rt_runqueue will not be picked to be the next task
> when scheduling, could they be migrated by pushing and pulling?

Note, run queues are not throttled, groups are. And tasks on a throttled
group should not be touched by the push/pull algorithm.

-- Steve

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/