On Wed, Jun 22, 2016 at 05:45:05PM +0000, Shaun Reitan wrote: > Any of you guys ever seen an issue with Xen 4.4 were xm cannot create a > guest because of what looks like an issue allocating memory even though xm > info shows like 5x the amount of free memory needed? We are still > unfortunately still using xm... it's on my list, i know.. > We've had this happen on a couple hosts now. Only way to resolve seams to > be rebooting the host. I'm going to update the host to latest Xen 4.4 now > hoping this is a old bug. > Here's from xen logs > [2016-06-22 09:13:50 1958] DEBUG (XendDomainInfo:105) > XendDomainInfo.create(['vm', ['name', 'xxx'], ['memory', 2048], > ['on_xend_start', 'ignore'], ['on_xend_stop', 'ignore'], ['vcpus', 2], > ['oos', 1], ['image', ['linux', ['kernel', '/kernels/vmlinux-2.6.18.8-4'], > ['videoram', 4], ['args', 'root=/dev/xvda ro xencons=tty console=tty1 '], > ['tsc_mode', 0], ['nomigrate', 0]]], ['s3_integrity', 1], ['device', > ['vbd', ['uname', 'phy:vg/fs_6818'], ['dev', 'xvda'], ['mode', 'w']]], > ['device', ['vbd', ['uname', 'phy:vg/fs_6819'], ['dev', 'xvdb'], ['mode', > 'w']]], ['device', ['vif', ['rate', '40mb/s'], ['mac', > 'FE:FD:48:01:F1:E7']]]]) > [2016-06-22 09:13:50 1958] DEBUG (XendDomainInfo:2504) > XendDomainInfo.constructDomain > [2016-06-22 09:13:50 1958] DEBUG (balloon:187) Balloon: 7602632 KiB free; > need 16384; done. > Hmm.. so you're using (dom0) memory ballooning? You might want to disable it. Things worked better without ballooning (at least with xend). -- Pasi > [2016-06-22 09:13:50 1958] ERROR (XendDomainInfo:2566) (12, 'Cannot > allocate memory') > Traceback (most recent call last): > File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", > line 2561, in _constructDomain > target = self.info.target()) > Error: (12, 'Cannot allocate memory') > [2016-06-22 09:13:50 1958] ERROR (XendDomainInfo:490) VM start failed > Traceback (most recent call last): > File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", > line 475, in start > XendTask.log_progress(0, 30, self._constructDomain) > 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 2572, in _constructDomain > raise VmError(failmsg) > VmError: Creating domain failed: name=xxx > [2016-06-22 09:13:50 1958] ERROR (XendDomainInfo:110) Domain construction > failed > Traceback (most recent call last): > File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", > line 108, in create > vm.start() > File "/usr/lib64/python2.6/site-packages/xen/xend/XendDomainInfo.py", > line 475, in start > XendTask.log_progress(0, 30, self._constructDomain) > 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 2572, in _constructDomain > raise VmError(failmsg) > VmError: Creating domain failed: name=xxx > -- > Shaun