Re: [Xen-users] Memory problems persist... Cannot allocate memory

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sat, Jan 23, 2010 at 10:21:09AM -0500, James Pifer wrote:
> > > 
> > > 
> > > # top
> > > 
> > > top - 20:02:11 up 39 days,  9:03,  2 users,  load average: 0.11, 0.85, 
> > > 1.25
> > > Tasks: 256 total,   1 running, 255 sleeping,   0 stopped,   0 zombie
> > > Cpu(s):  0.0%us,  0.1%sy,  0.0%ni, 98.5%id,  0.5%wa,  0.0%hi,  0.1%si,  
> > > 0.8%st
> > > Mem:   2095616k total,  1689848k used,   405768k free,    11624k buffers
> > > Swap:  2104472k total,  1476856k used,   627616k free,   406620k cached
> > >
> > 
> > xend is using 1,8 GB of memory? Is that normal? Even RES is almost 1 GB..
> > 
> > Please post the following logs:
> > 
> > - "xm log" 
> > - "xm dmesg"
> > - dom0 "dmesg"
> > - and if there's something related in /var/log/messages or /var/log/syslog
> > 
> > -- Pasi
> 
> Pasi,
> 
> Here's the info. I don't have a /var/log/syslog. What is dom0 "dmesg"? I
> tried that exact command and dom0 dmesg. 
>

Just run "dmesg" command in dom0 linux, and it'll print the dom0 kernel logs.

> I didn't see anything relevant in /var/log/messages so I attached the whole 
> thing. 
> 
> Thanks for the help. I would love to figure out why this keeps
> happening. 
> 

[2010-01-22 19:53:18 5610] ERROR (SrvBase:88) Request start failed.
Traceback (most recent call last):
  File "/usr/lib64/python2.6/site-packages/xen/web/SrvBase.py", line 85, in 
perform
    return op_method(op, req)
  File "/usr/lib64/python2.6/site-packages/xen/xend/server/SrvDomain.py", line 
77, in op_start
    return self.xd.domain_start(self.dom.getName(), paused)
  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomain.py", line 1040, 
in domain_start
    dominfo.start(is_managed = True)
  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 
459, in start
    XendTask.log_progress(31, 60, self._initDomain)
  File "/usr/lib64/python2.6/site-packages/xen/xend/XendTask.py", line 209, in 
log_progress
    retval = func(*args, **kwds)
  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 
2594, in _initDomain
    self._createDevices()
  File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", line 
2218, in _createDevices
    self.image.createDeviceModel()
  File "/usr/lib64/python2.6/site-packages/xen/xend/image.py", line 419, in 
createDeviceModel
    pid = os.fork()
OSError: [Errno 12] Cannot allocate memory


Uhm.. I wonder what memory it fails to allocate.

-- Pasi


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