From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: John Candlish <john.candlish@gmail.com>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai] Fwd: Fwd: SMI problems with 2.6.2.1 and last weekends git version
Date: Fri, 31 May 2013 22:16:11 +0200 [thread overview]
Message-ID: <51A9050B.3060206@xenomai.org> (raw)
In-Reply-To: <CAN0BPY_Gicv-2em8mqbjupC=9VFTgTLgP-djQrjvi1c8PcM1yA@mail.gmail.com>
On 05/31/2013 04:03 PM, John Candlish wrote:
> Thank you for you timely reply. I'll check again with another of the same
> computer+bios as well as a core2 ICH7 machine.
>
> I should mention that the particular machine tested does respond to the
> rtai_smi.ko module, in that the presence of that module significantly
> reduces (eliminates actually) the periodic smi latencies.
>
> It is curious. I'll look again.
Well, the RTAI module does not check if clearing the SMI bit actually
work, this was added later in Xenomai. So, I would say the result is the
same, only you do not see it.
Another difference is that the RTAI module does not do the
"pci_device_put" right away, which prevents loading other kernel modules
which would like to request the LPC PCI device. I doubt that could make
a difference though.
--
Gilles.
prev parent reply other threads:[~2013-05-31 20:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAN0BPY_SzMoNrgOF2fBwrMA=7scopqTKPC+pxkk12wtGMsWdGQ@mail.gmail.com>
2013-05-31 10:00 ` [Xenomai] Fwd: SMI problems with 2.6.2.1 and last weekends git version John Candlish
2013-05-31 11:20 ` Gilles Chanteperdrix
2013-05-31 14:03 ` [Xenomai] Fwd: " John Candlish
2013-05-31 20:16 ` Gilles Chanteperdrix [this message]
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=51A9050B.3060206@xenomai.org \
--to=gilles.chanteperdrix@xenomai.org \
--cc=john.candlish@gmail.com \
--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.