From: Markus Seemann <International-Asso@domain.hid>
To: xenomai@xenomai.org
Subject: [Xenomai-help] Deadlock with interrupt shield activated / Avoid mode switches at compile time
Date: Wed, 28 Jul 2010 10:41:12 +0200 (CEST) [thread overview]
Message-ID: <638179785.1790459.1280306472842.JavaMail.fmail@domain.hid> (raw)
Hello,
a more theoretical question:
Is it possible to provocate a deadlock while switching a RTTask from primary mode to secondary mode when the interrupt shield is activated?
Perhaps with this kind of scenario:
- linux process takes semaphore
- RTTask switches to secondary mode and also tries to take this semaphore
- The semaphore would be released in ISR context of the linux kernel. But the interrupt shield prevents the execution of this isr.
How realistic is this scenario?
Another question:
Is it possible to avoid mode switches for realtime tasks at compile time for a specific task?
Thanks in advance,
Markus
___________________________________________________________
Neu: WEB.DE De-Mail - Einfach wie E-Mail, sicher wie ein Brief!
Jetzt De-Mail-Adresse reservieren: https://produkte.web.de/go/demail02
next reply other threads:[~2010-07-28 8:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-28 8:41 Markus Seemann [this message]
2010-07-28 8:50 ` [Xenomai-help] Deadlock with interrupt shield activated / Avoid mode switches at compile time Gilles Chanteperdrix
2010-07-31 10:35 ` Philippe Gerum
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=638179785.1790459.1280306472842.JavaMail.fmail@domain.hid \
--to=international-asso@domain.hid \
--cc=xenomai@xenomai.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.