From mboxrd@z Thu Jan  1 00:00:00 1970
From: Don Slutz <dslutz@verizon.com>
Subject: Re: [BUG] -- unable to boot 4.5-unstable after commit
	e13b3203990706db1313ec2aadd9a30b249ee793
Date: Thu, 28 Aug 2014 17:49:21 -0400
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To: "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>, Andrew Cooper <andrew.cooper3@citrix.com>
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The key here may be the command line options:

(XEN) Command line: placeholder dom0_mem=2G loglvl=all guest_loglvl=all 
console_timestamps=1 com1=9600,8n1 console=com1 apic_verbosity=verbose 
crashkernel=256M@256M no-cpuidle

     -Don Slutz

On 08/28/14 17:47, Don Slutz wrote:
> dcs-xen-54:~/xen>git-bisect good
> e13b3203990706db1313ec2aadd9a30b249ee793 is the first bad commit
> commit e13b3203990706db1313ec2aadd9a30b249ee793
> Author: Andrew Cooper <andrew.cooper3@citrix.com>
> Date:   Fri Aug 22 14:32:45 2014 +0200
>
>     x86/irq: process softirqs in irq keyhandlers
>
>     Large machines with lots of interrupts can trip over the Xen 
> watchdog.
>
>     Suggested-by: Santosh Jodh <Santosh.Jodh@citrix.com>
>     Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
>     Tested-by: Santosh Jodh <Santosh.Jodh@citrix.com>
>
> :040000 040000 d43de46a55f8ca96c6bbcb0fcc8b705d439d44c8 
> e949c76ae45ecb1a6e1d5fce9ada5b89712fbd87 M      xen
>
> This patch prevents xen from booting on my hardware.
>
> Here is the tail of the serial console output:
>
> ...
> (XEN) init IO_APIC IRQs
> (XEN)  IO-APIC (apicid-pin) 0-0, 0-16, 0-17, 0-18, 0-19, 0-20, 0-21, 
> 0-22, 0-23 not connected.
> (XEN) ..TIMER: vector=0xF0 apic1=0 pin1=2 apic2=-1 pin2=-1
> (XEN) number of MP IRQ sources: 15.
> (XEN) number of IO-APIC #0 registers: 24.
> (XEN) testing the IO APIC.......................
>
>
>     -Don Slutz