Re: xl segfault when starting a guest

[Christoph Egger <Christoph.Egger@amd.com>]

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On 08/03/12 16:45, Ian Campbell wrote:

> On Fri, 2012-08-03 at 15:24 +0100, Christoph Egger wrote:
>> Hi,
>>
>> I installed c/s 25729 and xl crashes.
>> The prior c/s I used was 25687 and worked fine.
> 
> These number can be ambiguous, what are the long hashes?


25729:6ccad16b50b6
25687:fab4434f5145

> 
>> I can't find any c/s that could touch libxl in such a way.
> 
> Me neither, but the xlu disk parser has been touched recently, e.g.
> 25727:a8d708fcb347 is in there.

Yes, that's it.
Reverting this changeset makes xl work again for me.


> Recently there was 25665:fab03d9ee1ba and 25663:968b205da696 too.
> 
> A dry run with your syntax seems to work for me e.g. :
>         xl -N block-attach 0 'file:/hvm-guest/win2008.img,ioemu:hda,w'


This also crashes for me but works for me with c/s 25727:a8d708fcb347
reverted.
xl info works.

 
> Did the generated flex files get rebuilt in your environment?
> 
>> Starting program: /usr/local.25729/sbin/xl create -c /hvm-guest/win2008.conf
> 
> Can you send win2008.conf please.


Attached.

> 
> Does a dry run create reproduce it? xl -N create .../win2008.conf --
> that'll be easier for me to repro.


Yes.

 
> Is this under NetBSD?


Yes.

Christoph


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#  -*- mode: python; -*-
#============================================================================
# Python configuration setup for 'xm create'.
# This script sets the parameters used when a domain is created using 'xm create'.
# You use a separate script for each domain you want to create, or 
# you can set the parameters for the domain on the xm command line.
#============================================================================

#----------------------------------------------------------------------------
# Kernel image file.
#kernel = "hvmloader"

# The domain build function. HVM domain uses 'hvm'.
builder='hvm'

# Initial memory allocation (in megabytes) for the new domain.
#
# WARNING: Creating a domain with insufficient memory may cause out of
#          memory errors. The domain needs enough memory to boot kernel
#          and modules. Allocating less than 32MBs is not recommended.
#memory = 6500
#memory = 512
#memory = 2048
memory = 3072

nestedhvm=1

# Shadow pagetable memory for the domain, in MB.
# Should be at least 2KB per MB of domain memory, plus a few MB per vcpu.
#shadow_memory = 20

# A name for your domain. All domains must have different names.
name = "win2008"

# 128-bit UUID for the domain.  The default behavior is to generate a new UUID
# on each call to 'xm create'.
#uuid = "06ed00fe-1162-4fc4-b5d8-11993ee4a8b9"

#-----------------------------------------------------------------------------
# the number of cpus guest platform has, default=1
vcpus=1

# enable/disable HVM guest PAE, default=0 (disabled)
#pae=1

# enable/disable HVM guest ACPI, default=0 (disabled)
acpi=1

# enable/disable HVM guest APIC, default=0 (disabled)
apic=1

#cpuid="host,page1gb=k,hypervisor=0,svm_npt=0"
cpuid="host,page1gb=k,hypervisor=0"

# List of which CPUS this domain is allowed to use, default Xen picks
#cpus = ""         # leave to Xen to pick
#cpus = "0"        # all vcpus run on CPU0
#cpus = "0-3,5,^1" # run on cpus 0,2,3,5
#cpus = "2-3"

# Optionally define mac and/or bridge for the network interfaces.
# Random MACs are assigned if not given.
#vif = [ 'type=ioemu, mac=00:16:3e:00:ce:a3, bridge=bridge0, model=ne2k_pci' ]
# type=ioemu specify the NIC is an ioemu device not netfront
vif = [ 'type=ioemu, mac=00:16:3e:01:ce:a3, bridge=bridge0, model=e1000'  ]

#----------------------------------------------------------------------------
# Define the disk devices you want the domain to have access to, and
# what you want them accessible as.
# Each disk entry is of the form phy:UNAME,DEV,MODE
# where UNAME is the device, DEV is the device name the domain will see,
# and MODE is r for read-only, w for read-write.

disk = [ 'file:/hvm-guest/win2008.img,ioemu:hda,w', 'file:/hvm-guest/win2008.iso,hdc:cdrom,r' ] 

#----------------------------------------------------------------------------
# Configure the behaviour when a domain exits.  There are three 'reasons'
# for a domain to stop: poweroff, reboot, and crash.  For each of these you
# may specify:
#
#   "destroy",        meaning that the domain is cleaned up as normal;
#   "restart",        meaning that a new domain is started in place of the old
#                     one;
#   "preserve",       meaning that no clean-up is done until the domain is
#                     manually destroyed (using xm destroy, for example); or
#   "rename-restart", meaning that the old domain is not cleaned up, but is
#                     renamed and a new domain started in its place.
#
# The default is
#
#   on_poweroff = 'destroy'
#   on_reboot   = 'restart'
#   on_crash    = 'restart'
#
# For backwards compatibility we also support the deprecated option restart
#
# restart = 'onreboot' means on_poweroff = 'destroy'
#                            on_reboot   = 'restart'
#                            on_crash    = 'destroy'
#
# restart = 'always'   means on_poweroff = 'restart'
#                            on_reboot   = 'restart'
#                            on_crash    = 'restart'
#
# restart = 'never'    means on_poweroff = 'destroy'
#                            on_reboot   = 'destroy'
#                            on_crash    = 'destroy'

#on_poweroff = 'destroy'
#on_reboot   = 'restart'
#on_crash    = 'restart'
#on_poweroff = 'preserve'
#on_reboot   = 'preserve'
#on_crash    = 'preserve'
on_crash    = 'destroy'
on_poweroff = 'destroy'
on_reboot = 'destroy'

#============================================================================

# Device Model
#device_model = 'qemu-dm'

#-----------------------------------------------------------------------------
# boot on floppy (a), hard disk (c) or CD-ROM (d) 
# default: hard disk, cd-rom, floppy
boot="cd"
#boot="dc"

#-----------------------------------------------------------------------------
#  write to temporary files instead of disk image files
#snapshot=1

#----------------------------------------------------------------------------
# enable SDL library for graphics, default = 0
sdl=0

#----------------------------------------------------------------------------
# enable VNC library for graphics, default = 1
vnc=1

#----------------------------------------------------------------------------
# address that should be listened on for the VNC server if vnc is set.
# default is to use 'vnc-listen' setting from /etc/xen/xend-config.sxp
vnclisten="0.0.0.0"

#----------------------------------------------------------------------------
# set VNC display number, default = domid
#vncdisplay=1

#----------------------------------------------------------------------------
# try to find an unused port for the VNC server, default = 1
#vncunused=1

#----------------------------------------------------------------------------
# enable spawning vncviewer for domain's console
# (only valid when vnc=1), default = 0
#vncconsole=0

#----------------------------------------------------------------------------
# set password for domain's VNC console
# default is depents on vncpasswd in xend-config.sxp
vncpasswd=''

#----------------------------------------------------------------------------
# no graphics, use serial port
nographic=0

#----------------------------------------------------------------------------
# enable stdvga, default = 0 (use cirrus logic device model)
stdvga=1

#-----------------------------------------------------------------------------
#   serial port re-direct to pty deivce, /dev/pts/n 
#   then xm console or minicom can connect
#serial='pty'


#-----------------------------------------------------------------------------
#   enable sound card support, [sb16|es1370|all|..,..], default none
#soundhw='sb16'


#-----------------------------------------------------------------------------
#    set the real time clock to local time [default=0 i.e. set to utc]
#localtime=1


#-----------------------------------------------------------------------------
#    start in full screen
#full-screen=1   


#-----------------------------------------------------------------------------
#   Enable USB support (specific devices specified at runtime through the
#			monitor window)
#usb=1
usb=1

#   Enable USB mouse support (only enable one of the following, `mouse' for
#			      PS/2 protocol relative mouse, `tablet' for
#			      absolute mouse)
#usbdevice='mouse'
usbdevice='tablet'


#viridian=1
#hpet=0

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