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] [PATCH] nucleus: Fix interrupt handler tails
Date: Fri, 17 Jun 2011 12:55:46 +0200 [thread overview]
Message-ID: <4DFB32B2.1010904@domain.hid> (raw)
In-Reply-To: <4DFB1DC3.80203@domain.hid>
On 06/17/2011 11:26 AM, Jan Kiszka wrote:
> Our current interrupt handlers assume that they leave over the same task
> and CPU they entered. But CONFIG_XENO_HW_UNLOCKED_SWITCH and commit
> f6af9b831c broke this assumption: xnpod_schedule invoked from the
> handler tail can now actually trigger a domain migration
What unlocked context swith introduce from my point of view is simply
sections where interrupt happen which do not reschedule.
f6af9b831c introduce a rescheduling point, but does not change what
happens during the interrupt handler either.
So, I do not really understand this commit message. Either we can assume
that interrupt handlers migrate tasks or not, but this does not seem to
have anything to do with unlocked context switches or commit f6af9b831c.
--
Gilles.
next prev parent reply other threads:[~2011-06-17 10:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-17 9:26 [Xenomai-core] [PATCH] nucleus: Fix interrupt handler tails Jan Kiszka
2011-06-17 10:55 ` Gilles Chanteperdrix [this message]
2011-06-17 11:03 ` Jan Kiszka
2011-06-17 11:06 ` Gilles Chanteperdrix
2011-06-17 11:22 ` Jan Kiszka
2011-06-17 11:26 ` Gilles Chanteperdrix
2011-06-17 11:28 ` Jan Kiszka
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