linux-kernel - Re: [PATCH] kthread: run kthreadd with max priority SCHED

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Message-Id: <1198318696.24423.64.camel@perihelion>
Date:	Sat, 22 Dec 2007 05:18:16 -0500
From:	Jon Masters <jcm@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Michal Schmidt <mschmidt@...hat.com>, linux-kernel@...r.kernel.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Satoru Takeuchi <takeuchi_satoru@...fujitsu.com>
Subject: Re: [PATCH] kthread: run kthreadd with max priority SCHED_FIFO

On Sat, 2007-12-22 at 02:11 -0800, Andrew Morton wrote:

> Should there be a watchdog which checks for a process which has run
> realtime for a certain period and which then takes some action?  Such as
> descheduling it for a while, generating warnings, demoting its policy,
> killing it etc?

Using the analogy of the OOM killer being called, this wouldn't be a bad
idea IMO - especially if it were configurable, and off by default. This
couldn't be done in a kernel thread (unless some new priority level were
created for it), but I think the details can be worked out later.

Michal - what do you think is the best upstream solution?

Jon.


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