From: Thomas Goetz <tcgoetz@gmail.com>
To: xen-devel@lists.xensource.com
Subject: Losing PS/2 Interrupts
Date: Thu, 19 May 2011 17:45:56 -0400 [thread overview]
Message-ID: <3E2050B5-59DC-4E4F-9C8D-8C04A6B465EB@gmail.com> (raw)
I'm running PVOPs 2.6.38 on Xen 4.0.2 RC3 and while booting a guest I lose interrupts for the PS/2 trackpad. The trackpad stops functioning because the device is waiting for service. I added a work around that calls i8042_interupt form a timer if it hasn't been called in 1s and it started working again. I added some code to Xen to count IRQ 12 and compared that to the IRQ 12 count in //proc/interrupts (I stopped PS/2 activity and waited for PS/2 interrupt activity to stop before taking the counts). I lose one interrupt in Dom0 every time the trackpad freezes.
(XEN) IRQ 12 count 21048
12: 21047 0 xen-pirq-ioapic-edge i8042 <--- lost an interrupt in dom0
...
(XEN) IRQ 12 count 48540
12: 48537 0 xen-pirq-ioapic-edge i8042 <--- lost 3 interrupts in dom0
I looked at the point at which the trackpad gets it's last interrupt in a trace and the other major activity at that time is the event channel that services the Qemu vcpu io_req code.
This 2.6.38 tree has a merge of Stafano's 2.6.39 fixes in drivers/xen/events.c.
Anyone have any ideas or suggestions?
-Tom Goetz
---
Tom Goetz
tcgoetz@gmail.com
next reply other threads:[~2011-05-19 21:45 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-19 21:45 Thomas Goetz [this message]
2011-05-20 15:53 ` Losing PS/2 Interrupts Thomas Goetz
2011-05-20 17:50 ` Konrad Rzeszutek Wilk
2011-05-20 18:06 ` Thomas Goetz
2011-05-23 8:26 ` Jan Beulich
2011-05-23 12:09 ` Thomas Goetz
2011-05-23 13:02 ` Jan Beulich
2011-05-23 13:45 ` Stefano Stabellini
2011-05-23 17:16 ` Thomas Goetz
2011-05-23 17:28 ` Thomas Goetz
2011-05-23 18:39 ` Thomas Goetz
2011-05-24 13:53 ` Stefano Stabellini
2011-05-24 15:37 ` Thomas Goetz
2011-05-24 15:58 ` Stefano Stabellini
2011-05-24 9:07 ` Jan Beulich
2011-05-24 11:04 ` Stefano Stabellini
2011-05-24 12:24 ` Jan Beulich
2011-05-24 12:58 ` Konrad Rzeszutek Wilk
2011-05-24 15:40 ` Jan Beulich
2011-05-24 16:00 ` Stefano Stabellini
2011-05-24 13:52 ` Stefano Stabellini
2011-05-24 15:37 ` Jan Beulich
2011-05-24 16:35 ` Stefano Stabellini
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=3E2050B5-59DC-4E4F-9C8D-8C04A6B465EB@gmail.com \
--to=tcgoetz@gmail.com \
--cc=xen-devel@lists.xensource.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).