From: Jan Kiszka <jan.kiszka@domain.hid>
To: "Harkema, G.A." <G.A.Harkema@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-core] rtdm_irq_request
Date: Mon, 21 Aug 2006 12:42:26 +0200 [thread overview]
Message-ID: <44E98E12.3030406@domain.hid> (raw)
In-Reply-To: <E443EE6E95070D46896C24F5C44EA7F53A1624@domain.hid>
[-- Attachment #1: Type: text/plain, Size: 943 bytes --]
Harkema, G.A. wrote:
> Hello,
>
>
>
> I' am having some problems with using the rtdm_irq_request() function. I
> disabled my local APIC support in the kernel (2.6.17, xenomai 2.2.0). My
> device (USB-HOST controller) shares his IRQ with the Ethernet
> card(e1000). After calling rtdm_irq_request() my system hangs. I tried
> to unload the e1000 module first and it seems to work fine. Can I share
> non-realtime interrupts whit real-time interrupts. If yes, what went
> wrong.
Nope you can't share. The e1000 driver could otherwise cause priority
inversions when an Ethernet-related IRQ is pending, the IRQ line will
get disabled therefore, and thus succeeding RT-USB-originated IRQs will
be shadowed until Linux gets a chance to run again.
That the system hangs is due to the ungraceful way we currently handle
such exceptions. [@Dmitry: This is one example of the frequent problems
I was referring to...]
Jan
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 250 bytes --]
next prev parent reply other threads:[~2006-08-21 10:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-21 9:56 [Xenomai-core] rtdm_irq_request Harkema, G.A.
2006-08-21 10:42 ` Jan Kiszka [this message]
2006-08-21 22:22 ` Dmitry Adamushko
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=44E98E12.3030406@domain.hid \
--to=jan.kiszka@domain.hid \
--cc=G.A.Harkema@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.