From: Oliver Neukum <oliver@neukum.org>
To: "Povolotsky, Alexander" <Alexander.Povolotsky@marconi.com>
Cc: "'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>,
"'andrebalsa@altern.org'" <andrebalsa@altern.org>,
"'Richard E. Gooch'" <rgooch@atnf.csiro.au>,
"'Ingo Molnar'" <mingo@elte.hu>,
"'rml@tech9.net'" <rml@tech9.net>,
"'akpm@osdl.org'" <akpm@osdl.org>,
"'Con Kolivas'" <kernel@kolivas.org>
Subject: Re: Preemption of the OS system call due to expiration of the time-sl ice for: a) SCHED_NORMAL (aka SCHED_OTHER) b) SCHED_RR
Date: Wed, 30 Jun 2004 12:50:04 +0200 [thread overview]
Message-ID: <200406301250.04473.oliver@neukum.org> (raw)
In-Reply-To: <313680C9A886D511A06000204840E1CF08F42FAE@whq-msgusr-02.pit.comms.marconi.com>
Am Mittwoch, 30. Juni 2004 11:50 schrieb Povolotsky, Alexander:
> Con - thanks for your kind answers !
>
> Preemption (due to the expiration of the time-slice) of the process, while
> it executes OS system call, - by another process (of equal or higher
> priority) when running under following scheduling policies:
>
> a) SCHED_NORMAL (aka SCHED_OTHER)
> b) SCHED_RR
>
> Is it possible in Linux 2.6 ? Linux 2.4 ?
It is possible if the kernel is compiled with CONFIG_PREEMPT
and the calling task has not blocked it.
HTH
Oliver
prev parent reply other threads:[~2004-06-30 10:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-30 9:50 Povolotsky, Alexander
2004-06-30 10:35 ` Ingo Molnar
2004-06-30 10:50 ` Oliver Neukum [this message]
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