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Date: Sun, 14 Jul 2002 14:29:12 +0200
From: Pavel Machek <pavel@ucw.cz>
To: Ingo Molnar <mingo@elte.hu>
Cc: oleg@tv-sign.ru, linux-kernel@vger.kernel.org
Subject: Re: [patch] sched-2.5.24-D3, batch/idle priority scheduling, SCHED_BATCH
Message-ID: <20020714122911.GA179@elf.ucw.cz>
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Hi!

> > > > And users of __KERNEL_SYSCALLS__ and kernel_thread() should not
> > > > have policy == SCHED_BATCH.
> > 
> > well, there's one security consequence here - module loading
> > (request_module()), which spawns a kernel thread must not run as
> > SCHED_BATCH. I think the right solution for that path is to set the
> > policy to SCHED_OTHER upon entry, and restore it to the previous one
> > afterwards - this way the helper thread has SCHED_OTHER priority.
> 
> i've solved this problem by making kernel_thread() spawned threads drop
> back to SCHED_NORMAL:

Does it mean that we now have working scheduler class that only
schedules jobs when no other thread wants to run (as long as
SCHED_BATCH task does not enter the kernel)?
									Pavel
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