Re: [Xen-devel] Re: need to compile 32bit on x86_64 cpu

[Jerone Young <jyoung5@us.ibm.com>]

If you are using paravirutal Xen (which I believe you are). You "cannot"
use a 32-bit Xen domU kernel with it. You have you use 64-bit Xen domU
kernel with it. I can tell by the path you are using 64bit Xen
"/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/xend/XendDomainInfo.py". Best to stick with 32-bit Xen if you want to run 32bit domUs.


On Fri, 2006-06-23 at 02:18 +0530, Anand Gupta wrote:
> I finally got the compilation done and copied the kernel and init
> image for use for domU for 32bit OS.
> 
> When i try to use the kernel i get an error "Error: (9, 'Bad file
> descriptor')"
> 
> Here is the extract from xend.log,
> 
> [2006-06-22 13:33:16 xend.XendDomainInfo] DEBUG (XendDomainInfo:877)
> XendDomainInfo.handleShutdownWatch
> [2006-06-22 13:33:16 xend.XendDomainInfo] DEBUG (XendDomainInfo:877)
> XendDomainInfo.handleShutdownWatch 
> [2006-06-22 13:33:30 xend.XendDomainInfo] INFO (XendDomainInfo:836)
> Domain has shutdown: name=anand01 id=5 reason=poweroff.
> [2006-06-22 13:33:30 xend.XendDomainInfo] DEBUG (XendDomainInfo:1327)
> XendDomainInfo.destroy : domid=5
> [2006-06-22 13:33:30 xend.XendDomainInfo] DEBUG (XendDomainInfo:1335)
> XendDomainInfo.destroyDomain(5)
> [2006-06-22 13:34:10 xend.XendDomainInfo] DEBUG (XendDomainInfo:178)
> XendDomainInfo.create(['vm', ['name', 'anand01'], ['memory', 256],
> ['vcpus', 1], ['image', ['linux', ['kernel', '/home/vmlinuz-
> 2.6.16.13-xen-x86_32'], ['ramdisk',
> '/home/initrd-2.6.16-xen-x86_32.img'], ['ip',
> 'x.x.x.x:1.2.3.4:y.y.y.y:255.255.255.128::eth0:off'], ['root',
> '/dev/sda1 ro'], ['args', 'selinux=0 3']]], ['device', ['vbd',
> ['uname', 'phy:/dev/vg01/anand01'], ['dev', 'sda1'], ['mode', 'w']]],
> ['device', ['vbd', ['uname', 'phy:/dev/vg01/anand01-swap'], ['dev',
> 'sda2'], ['mode', 'w']]], ['device', ['vif', ['ip', ' x.x.x.x'],
> ['mac', '00:16:00:18:99:FB'], ['vifname', 'anand01'], ['bridge',
> 'xenbr0']]]])
> [2006-06-22 13:34:10 xend.XendDomainInfo] DEBUG (XendDomainInfo:284)
> parseConfig: config is ['vm', ['name', 'anand01'], ['memory', 256],
> ['vcpus', 1], ['image', ['linux', ['kernel', '/home/vmlinuz-
> 2.6.16.13-xen-x86_32'], ['ramdisk',
> '/home/initrd-2.6.16-xen-x86_32.img'], ['ip',
> 'x.x.x.x:1.2.3.4:y.y.y.y:255.255.255.128::eth0:off'], ['root',
> '/dev/sda1 ro'], ['args', 'selinux=0 3']]], ['device', ['vbd',
> ['uname', 'phy:/dev/vg01/anand01'], ['dev', 'sda1'], ['mode', 'w']]],
> ['device', ['vbd', ['uname', 'phy:/dev/vg01/anand01-swap'], ['dev',
> 'sda2'], ['mode', 'w']]], ['device', ['vif', ['ip', ' x.x.x.x'],
> ['mac', '00:16:00:18:99:FB'], ['vifname', 'anand01'], ['bridge',
> 'xenbr0']]]]
> [2006-06-22 13:34:10 xend.XendDomainInfo] DEBUG (XendDomainInfo:380)
> parseConfig: result is {'ssidref': None, 'uuid': None, 'on_crash':
> None, 'on_reboot': None, 'image': ['linux', ['kernel', '/home/vmlinuz-
> 2.6.16.13-xen-x86_32'], ['ramdisk',
> '/home/initrd-2.6.16-xen-x86_32.img'], ['ip',
> 'x.x.x.x:1.2.3.4:y.y.y.y:255.255.255.128::eth0:off'], ['root',
> '/dev/sda1 ro'], ['args', 'selinux=0 3']], 'on_poweroff': None,
> 'cpus': None, 'name': 'anand01', 'backend': [], 'vcpus': 1,
> 'cpu_weight': None, 'vcpu_avail': None, 'memory': 256, 'device':
> [('vbd', ['vbd', ['uname', 'phy:/dev/vg01/anand01'], ['dev', 'sda1'],
> ['mode', 'w']]), ('vbd', ['vbd', ['uname',
> 'phy:/dev/vg01/anand01-swap'], ['dev', 'sda2'], ['mode', 'w']]),
> ('vif', ['vif', ['ip', ' x.x.x.x'], ['mac', '00:16:00:18:99:FB'],
> ['vifname', 'anand01'], ['bridge', 'xenbr0']])], 'bootloader': None,
> 'cpu': None, 'maxmem': None}
> [2006-06-22 13:34:10 xend.XendDomainInfo] DEBUG (XendDomainInfo:1164)
> XendDomainInfo.construct : None 0
> [2006-06-22 13:34:10 xend.XendDomainInfo] DEBUG (XendDomainInfo:1196)
> XendDomainInfo.initDomain: 6 1.0
> [2006-06-22 13:34:10 xend] DEBUG (balloon:126) Balloon: free 257; need
> 257; done.
> [2006-06-22 13:34:10 xend] INFO (image:135) buildDomain os=linux dom=6
> vcpus=1 
> [2006-06-22 13:34:10 xend] DEBUG (image:173) dom            = 6
> [2006-06-22 13:34:10 xend] DEBUG (image:174) image
> = /home/vmlinuz-2.6.16.13-xen-x86_32
> [2006-06-22 13:34:10 xend] DEBUG (image:175) store_evtchn   = 1 
> [2006-06-22 13:34:10 xend] DEBUG (image:176) console_evtchn = 2
> [2006-06-22 13:34:10 xend] DEBUG (image:177) cmdline        =
> ip=x.x.x.x:1.2.3.4:y.y.y.y:255.255.255.128::eth0:off root=/dev/sda1 ro
> selinux=0 3
> [2006-06-22 13:34:10 xend] DEBUG (image:178) ramdisk
> = /home/initrd- 2.6.16-xen-x86_32.img
> [2006-06-22 13:34:10 xend] DEBUG (image:179) vcpus          = 1
> [2006-06-22 13:34:10 xend] DEBUG (image:180) features       =
> [2006-06-22 13:34:10 xend.XendDomainInfo] ERROR (XendDomainInfo:190)
> Domain construction failed 
> Traceback (most recent call last):
>   File
> "/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/xend/XendDomainInfo.py", line 183, in create
>     vm.initDomain()
>   File
> "/home/xen/xen-3.0.2-2 /dist/install/usr/lib64/python/xen/xend/XendDomainInfo.py", line 1225, in initDomain
>     channel_details = self.image.createImage()
>   File
> "/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/xend/image.py", line 118, in createImage 
>     return self.createDomain()
>   File
> "/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/xend/image.py", line 137, in createDomain
>     result = self.buildDomain()
>   File
> "/home/xen/xen-3.0.2-2 /dist/install/usr/lib64/python/xen/xend/image.py", line 188, in buildDomain
>     features       = self.features)
> error: (9, 'Bad file descriptor')
> [2006-06-22 13:34:10 xend.XendDomainInfo] DEBUG (XendDomainInfo:1327)
> XendDomainInfo.destroy: domid=6
> [2006-06-22 13:34:10 xend.XendDomainInfo] DEBUG (XendDomainInfo:1335)
> XendDomainInfo.destroyDomain(6)
> [2006-06-22 13:34:10 xend] ERROR (xmlrpclib2:124) (9, 'Bad file
> descriptor')
> Traceback (most recent call last): 
>   File
> "/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/util/xmlrpclib2.py", line 103, in _marshaled_dispatch
>     response = self._dispatch(method, params)
>   File "/usr/lib64/python2.3/SimpleXMLRPCServer.py", line 407, in
> _dispatch 
>     return func(*params)
>   File
> "/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/xend/server/XMLRPCServer.py", line 63, in domain_create
>     info = XendDomain.instance().domain_create(config)
>   File
> "/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/xend/XendDomain.py", line 227, in domain_create
>     dominfo = XendDomainInfo.create(config)
>   File
> "/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/xend/XendDomainInfo.py", line 183, in create 
>     vm.initDomain()
>   File
> "/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/xend/XendDomainInfo.py", line 1225, in initDomain
>     channel_details = self.image.createImage()
>   File "/home/xen/xen-
> 3.0.2-2/dist/install/usr/lib64/python/xen/xend/image.py", line 118, in
> createImage
>     return self.createDomain()
>   File
> "/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/xend/image.py", line 137, in createDomain 
>     result = self.buildDomain()
>   File
> "/home/xen/xen-3.0.2-2/dist/install/usr/lib64/python/xen/xend/image.py", line 188, in buildDomain
>     features       = self.features)
> error: (9, 'Bad file descriptor') 
> 
> This probably would mean that the kernel compiled is a non xen
> kernel ? (Please correct me if i am wrong)
> 
> I used the following to compile the kernel (after i used setarch
> linux32 bash)
> 
> make linux-2.6-xen-config CONFIGMODE=menuconfig
> make linux-2.6-xen-build
> 
> I then copied the dist/install/lib/modules to /lib/modules and then
> used depmod and mkinitrd to create the initrd image. Moved the kernel
> from dist/install/boot to /home where i call them from inside the
> config files. 
> 
> Can anyone tell me how to resolve the above problem ?
> 
> -- 
> regards,
> 
> Anand Gupta 
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