Re: [Xen-users] DomU max memory problem

[Pavel Krejca <krejca@xxxxxxxxxx>]

Same with Xen 3.3.0


Pavel Krejca wrote:
> Hi,
>
> when trying to run new domain under xen-3.2.1 with more than 127 MB 
> memory set in config file, I get this error message:
> "Error: memory_dynamic_max must be less than or equal to 
> memory_static_max"
> 128 MB is probably default value for domu. I tried to raise it by 
> "maxmem" option in guest config, but with same result (seems that 
> maxmem keyword is ignored by xend). I also tried to increase mem 
> limits with "xm mem-max" and "xm mem-set" on running domain, but it 
> has no effect unless domain is restarted. But after reboot, I get the 
> same error message.
> Last thing I tried was to hardcode higher default memory limit in 
> XendConfig.py (and compiled it to .pyc) but it had no effect too.
> So my question is, how can I start guest domain with memory set to 
> more than 128 MB? I suspect this value to be saved somewhere in xend 
> cache, but I can't find it. Why does Balloon driver think that only 
> 131064 KiB is free? Thanks for answer. My configuration follows:
> [xen]# cat /etc/xen/auto/testdomain.cfg
> kernel = "/boot/vmlinuz-xenU"
> cpus = "^0"
> maxmem = 512
> memory = 256
> name = "test_domain"
> vif = ['ip=192.168.0.2,bridge=eth0']
> disk = ['phy:sdb1,sda1,w','phy:sdb2,sda2,w']
> root = "/dev/sda1 ro"
>
> [xen]# tail /var/log/xen/xend.log
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:84) 
> XendDomainInfo.create(['vm', ['name', 'test_domain'], ['memory', 256], 
> ['maxmem', 512], ['vcpus', 1], ['on_xend_start', 'ignore'], 
> ['on_xend_stop', 'ignore'], ['cpus', '^0'], ['image', ['linux', 
> ['kernel', '/boot/vmlinuz-xenU'], ['root', '/dev/sda1 ro']]], 
> ['device', ['vbd', ['uname', 'phy:sdb1'], ['dev', 'sda1'], ['mode', 
> 'w']]], ['device', ['vbd', ['uname', 'phy:sdb2'], ['dev', 'sda2'], 
> ['mode', 'w']]], ['device', ['vif', ['ip', '192.168.0.2'], ['bridge', 
> 'eth0']]]])
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1618) 
> XendDomainInfo.constructDomain
> [2008-09-12 15:03:46 11411] DEBUG (balloon:132) Balloon: 131072 KiB 
> free; need 2048; done.
> [2008-09-12 15:03:46 11411] DEBUG (XendDomain:443) Adding Domain: 6
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1703) 
> XendDomainInfo.initDomain: 6 256
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1738) 
> _initDomain:shadow_memory=0x0, memory_static_max=0x20000000, 
> memory_static_min=0x0.
> [2008-09-12 15:03:46 11411] DEBUG (balloon:138) Balloon: 131064 KiB 
> free; 0 to scrub; need 262144; retries: 20.
> [2008-09-12 15:03:46 11411] DEBUG (balloon:153) Balloon: setting dom0 
> target to 3744 MiB.
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:693) Setting memory 
> target of domain Domain-0 (0) to 3744 MiB.
> [2008-09-12 15:03:46 11411] ERROR (XendDomainInfo:1775) 
> XendDomainInfo.initDomain: exception occurred
> Traceback (most recent call last):
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendDomainInfo.py", 
> line 1747, in _initDomain
>    balloon.free(memory + shadow)
>  File "usr/lib64/python2.5/site-packages/xen/xend/balloon.py", line 
> 154, in free
>    dom0.setMemoryTarget(new_alloc_mb)
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendDomainInfo.py", 
> line 697, in setMemoryTarget
>    self._safe_set_memory('memory_dynamic_max', target * MiB)
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendDomainInfo.py", 
> line 2362, in _safe_set_memory
>    self.info._memory_sanity_check()
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendConfig.py", line 
> 366, in _memory_sanity_check
>    raise XendConfigError("memory_dynamic_max must be less " \
> XendConfigError: Invalid Configuration: memory_dynamic_max must be 
> less than or equal to memory_static_max
> [2008-09-12 15:03:46 11411] ERROR (XendDomainInfo:440) VM start failed
> Traceback (most recent call last):
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendDomainInfo.py", 
> line 420, in start
>    XendTask.log_progress(31, 60, self._initDomain)
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendTask.py", line 
> 209, in log_progress
>    retval = func(*args, **kwds)
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendDomainInfo.py", 
> line 1778, in _initDomain
>    raise exn
> XendConfigError: Invalid Configuration: memory_dynamic_max must be 
> less than or equal to memory_static_max
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1897) 
> XendDomainInfo.destroy: domid=6
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1914) 
> XendDomainInfo.destroyDomain(6)
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1529) Destroying 
> device model
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1536) Releasing devices
> [2008-09-12 15:03:46 11411] ERROR (XendDomainInfo:89) Domain 
> construction failed
> Traceback (most recent call last):
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendDomainInfo.py", 
> line 87, in create
>    vm.start()
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendDomainInfo.py", 
> line 420, in start
>    XendTask.log_progress(31, 60, self._initDomain)
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendTask.py", line 
> 209, in log_progress
>    retval = func(*args, **kwds)
>  File "usr/lib64/python2.5/site-packages/xen/xend/XendDomainInfo.py", 
> line 1778, in _initDomain
>    raise exn
> XendConfigError: Invalid Configuration: memory_dynamic_max must be 
> less than or equal to memory_static_max
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1897) 
> XendDomainInfo.destroy: domid=None
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1914) 
> XendDomainInfo.destroyDomain(None)
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1534) No device model
> [2008-09-12 15:03:46 11411] DEBUG (XendDomainInfo:1536) Releasing devices
>
> [xen]# xm list
> Name                                        ID   Mem VCPUs      
> State   Time(s)
> Domain-0                                    0   512     1     
> r-----    258.9
> test_domain                               1   127     1     -b----    
> 220.8
> [xen]# free -m
>                   total       used       free     shared    
> buffers     cached
> Mem:          3872        372       3500          0         88         55
> -/+ buffers/cache:        227       3644
>
> [xen]# uname -a
> Linux xen 2.6.21-xen #3 SMP Fri Sep 5 17:22:35 CEST 2008 x86_64 
> Intel(R) Xeon(R) CPU E5420 @ 2.50GHz GenuineIntel GNU/Linux
>
> Pavel
>
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