From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: xenomai-core <xenomai@xenomai.org>
Subject: Re: [Xenomai-core] Troubles with switchtest
Date: Thu, 14 May 2009 10:42:09 +0200 [thread overview]
Message-ID: <4A0BD961.8010207@domain.hid> (raw)
In-Reply-To: <4A0BD882.5090803@domain.hid>
Jan Kiszka wrote:
> Gilles Chanteperdrix wrote:
>> Jan Kiszka wrote:
>>> I think the trick against /this/ is preempt_disable/enable in
>>> kernel_fpu/begin/end. But that won't work for Xenomai, of course.
>> Well, that does not prevent an IRQ or a page fault from computing a RAID
>> cheksum...
>
> If this is allowed, then... My impression was that FPU access is not
> legal from IRQ context.
If you have a mapped file on a raid disk and a page fault triggers a
write, I think the RAID routines will be used. But you are right, maybe
there is a test to use the plain integer RAID routines when called from
interrupt context.
--
Gilles.
prev parent reply other threads:[~2009-05-14 8:42 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-13 12:49 [Xenomai-core] Troubles with switchtest Jan Kiszka
2009-05-13 12:58 ` Gilles Chanteperdrix
2009-05-13 13:18 ` Jan Kiszka
2009-05-13 13:22 ` Philippe Gerum
2009-05-13 15:28 ` [Xenomai-core] [PATCH] Fix host IRQ propagation (was: Troubles with switchtest) Jan Kiszka
2009-05-13 15:55 ` Philippe Gerum
2009-05-13 16:10 ` [Xenomai-core] [PATCH] Fix host IRQ propagation Jan Kiszka
2009-05-13 20:50 ` Philippe Gerum
2009-05-14 10:20 ` Jan Kiszka
2009-05-14 10:49 ` Philippe Gerum
2009-05-14 11:00 ` Jan Kiszka
2009-05-14 11:10 ` Philippe Gerum
2009-05-14 12:52 ` Gilles Chanteperdrix
2009-05-14 13:00 ` Philippe Gerum
2009-05-14 13:10 ` Gilles Chanteperdrix
2009-05-17 10:32 ` Philippe Gerum
2009-05-13 18:14 ` Gilles Chanteperdrix
2009-05-13 18:24 ` Jan Kiszka
2009-05-13 19:06 ` [Xenomai-core] [PATCH] Fix host IRQ propagation (was: Troubles with switchtest) Martin Shepherd
2009-05-14 10:34 ` [Xenomai-core] [PATCH] Fix host IRQ propagation Jan Kiszka
2009-05-14 11:56 ` Gilles Chanteperdrix
2009-05-14 12:02 ` Jan Kiszka
2009-05-13 15:09 ` [Xenomai-core] Troubles with switchtest Gilles Chanteperdrix
2009-05-13 15:40 ` Jan Kiszka
2009-05-13 20:59 ` Gilles Chanteperdrix
2009-05-14 8:18 ` Jan Kiszka
2009-05-14 8:35 ` Gilles Chanteperdrix
2009-05-14 8:38 ` Jan Kiszka
2009-05-14 8:42 ` Gilles Chanteperdrix [this message]
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