From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: Xenomai core <Xenomai-core@domain.hid>
Subject: Re: [Xenomai-core] [RFC][PATCH] nucleus: Prevent rescheduling while in xntbase_tick
Date: Fri, 17 Jun 2011 12:58:14 +0200 [thread overview]
Message-ID: <4DFB3346.6000405@domain.hid> (raw)
In-Reply-To: <4DFB1E0B.1070903@domain.hid>
On 06/17/2011 11:27 AM, Jan Kiszka wrote:
> Based on code inspection, it looks like a timer handler triggering a
> reschedule in the path xntbase_tick -> xntimer_tick_aperiodic /
> xntimer_tick_periodic_inner -> handler can cause problems, e.g. a
> reschedule before all expired timers were processed. The timer core is
> usually run atomically from an interrupt handler, so better emulate an
> IRQ context inside xntbase_tick by setting XNINIRQ.
I do not understand this one either: if we are inside
xntimer_tick_aperiodic, XNINIRQ is already set.
--
Gilles.
next prev parent reply other threads:[~2011-06-17 10:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-17 9:27 [Xenomai-core] [RFC][PATCH] nucleus: Prevent rescheduling while in xntbase_tick Jan Kiszka
2011-06-17 10:58 ` Gilles Chanteperdrix [this message]
2011-06-17 11:03 ` Jan Kiszka
2011-06-17 11:58 ` Philippe Gerum
2011-06-17 12:11 ` Jan Kiszka
2011-06-17 12:12 ` Philippe Gerum
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