From: Eduardo Habkost <ehabkost@redhat.com>
To: kvm@vger.kernel.org
Subject: Re: 2.6.27.5 guest boot failure using in-kernel PIT
Date: Thu, 20 Nov 2008 20:05:17 -0200 [thread overview]
Message-ID: <20081120220517.GB30825@blackpad> (raw)
In-Reply-To: <20081120142253.GA30825@blackpad>
On Thu, Nov 20, 2008 at 12:22:53PM -0200, Eduardo Habkost wrote:
>
> Hi,
>
> When using a kvm.git kernel as host, I am getting guest boot failures
> when booting Fedora Rawhide kernel (2.6.27.5-117.fc10.x86_64). Guest
> stops booting at:
>
> ENABLING IO-APIC IRQs
> ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
> ..MP-BIOS bug: 8254 timer not connected to IO-APIC
> ...trying to set up timer (IRQ0) through the 8259A ...
> ..... (found apic 0 pin 0) ...
> ....... failed.
> ...trying to set up timer as Virtual Wire IRQ...
> ..... failed.
> ...trying to set up timer as ExtINT IRQ...
I've just found out this problem happens because the guest has HZ=1000
and the host had HZ=250 and no CONFIG_HIGH_RES_TIMERS.
With this setup, the host is not managing to inject enough timer
interrupts during the mdelay() loop on timer_irq_works().
--
Eduardo
next prev parent reply other threads:[~2008-11-20 22:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-20 14:22 2.6.27.5 guest boot failure using in-kernel PIT Eduardo Habkost
2008-11-20 22:05 ` Eduardo Habkost [this message]
2008-11-21 3:05 ` Sheng Yang
2008-11-21 7:54 ` Jan Kiszka
2008-11-21 13:17 ` Eduardo Habkost
2008-11-21 15:41 ` Jan Kiszka
2008-11-21 16:39 ` Eduardo Habkost
2008-11-21 17:06 ` Eduardo Habkost
2008-11-24 17:02 ` hrtimer_forward() semantics when using non-high-res timers Eduardo Habkost
2008-11-21 17:10 ` 2.6.27.5 guest boot failure using in-kernel PIT Marcelo Tosatti
2008-11-24 14:33 ` Glauber Costa
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=20081120220517.GB30825@blackpad \
--to=ehabkost@redhat.com \
--cc=kvm@vger.kernel.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.