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[Xen-devel] byg report : "console=com1" and "Unknown interrupt"

To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] byg report : "console=com1" and "Unknown interrupt"
From: Adam Sulmicki <adam@xxxxxxxxxxxx>
Date: Mon, 22 Nov 2004 13:22:34 -0500 (EST)
Delivery-date: Mon, 22 Nov 2004 18:10:34 +0000
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hello,
        I'm booting xen on iTuner over serial console. It seems to me
        that it is bug that unless I explictly specify "console=com1"
        I get unhelpfull message "Unknown Interrupt" and halt (infinite
        loop).

sh-2.05b# /sbin/kexec -e
Starting new kernel
Unknown interrupt

        adding "console=com1" fixes this problem for me so I doubt it
        I'm going to look at it any closer, but I though I would to
        submit it any way in case someone wants to make the error message
        more obvious or something.

Freeing unused kernel memory: 100k freed
sh-2.05b# mount /procc/cpuinfo

sh-2.05b# cat /proc/cpuinfo
processor       : 0
vendor_id       : CentaurHauls
cpu family      : 6
model           : 7
model name      : VIA Samuel 2
stepping        : 3
cpu MHz         : 533.502
cache size      : 64 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu de tsc msr cx8 mtrr pge mmx 3dnow
bogomips        : 1048.57

sh-2.05b# /sbin/kexec --load /usr/src/cm/xen/xen-2.0.bk/xen/xen 
--type=multiboot-x86 \
                --command-line="dom0_mem=65536 com1=19200,8n1 console=com1" \
                --module="/boot/vmlinuz-2.6.8.1-xen0-full root=/dev/hda1 
console=ttyS0"

kexec_load succeeded (multiboot-x86)

sh-2.05b# /sbin/kexec -e

Starting new kernel
 __  __            ____    ___     _          _
 \ \/ /___ _ __   |___ \  / _ \   | |__   ___| |_ __ _
  \  // _ \ '_ \    __) || | | |__| '_ \ / _ \ __/ _` |
  /  \  __/ | | |  / __/ | |_| |__| |_) |  __/ || (_| |
 /_/\_\___|_| |_| |_____(_)___/   |_.__/ \___|\__\__,_|

 http://www.cl.cam.ac.uk/netos/xen
 University of Cambridge Computer Laboratory



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