From: Philippe Gerum <rpm@xenomai.org>
To: Sean McGranaghan <smm@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] rt_task_delete() question
Date: Fri, 31 Mar 2006 12:22:05 +0200 [thread overview]
Message-ID: <442D02CD.6080508@domain.hid> (raw)
In-Reply-To: <442C19F2.206@domain.hid>
Sean McGranaghan wrote:
> Hello all,
>
> I am posting this for a co-worker who is having problems with killing a
> real-time task. (He is joining the email list shortly but for now I will
> pass responses on to him.) Here is the scenario:
>
> 1. A Linux process starts up and detaches from the tty (daemon)
> 2. The daemon creates a xeno message queue
> 2. The daemon spawns a xeno task
> 3. The xeno task on startup binds to the queue rt_queue_bind()
> 4. The xeno task waits on the queue recv with infinite timeout
> 5. The daemon process goes to sleep in a join, waiting for the task to exit
> 6. Some time later another program starts
> 7. The other non-realtime program looks up the xeno task name via
> rt_task_bind()
> 8. The other non-realtime program attempts to delete the task via
> rt_task_delete()
> Failed Attempt #1 - Non-realtime program calls rt_task_delete()
> and gets
> a segmentation fault
> Failed Attempt #2 - Non-realtime program spawns a realtime task
> which
> binds to original task and tries
> rt_task_delete().
> Also gets segmentation fault.
>
Eeek... 100% reproducible here. Blatant bug. More later. Thanks for
reporting.
> The was attempted one a system running the latest Xenomai 2.1 release.
>
> What is the preferred method to start/join threads from a non-realtime
> context?
>
> Any help is appreciated.
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help
--
Philippe.
next prev parent reply other threads:[~2006-03-31 10:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-30 17:48 [Xenomai-help] rt_task_delete() question Sean McGranaghan
2006-03-30 20:42 ` Jan Kiszka
2006-03-30 21:05 ` Philippe Gerum
2006-03-31 12:12 ` Sean McGranaghan
2006-03-31 10:22 ` Philippe Gerum [this message]
2006-03-31 14:20 ` 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=442D02CD.6080508@domain.hid \
--to=rpm@xenomai.org \
--cc=smm@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.