[Xen-devel] using 3.1.1 with 256GB host, 11_create_concurrent_pos of xm-test fails with Cannot allocate memory

["Krysan, Susan" <KRYSANS@xxxxxxxxxx>]

Test 11_create_concurrent_pos of xm-test suite only creates 33 domains and then gets: Cannot allocate memory.  The host has c/s 15464 of 3.1.1 and it has plenty of memory – 256GB.

 

Xend log shows:

 

[2007-10-15 09:06:48 6447] DEBUG (XendDomainInfo:84) XendDomainInfo.create(['vm', ['name', '11_create_34'], ['memory', 512], ['vcpus', 1], ['on_xend_start', 'ignore'], ['on_xend_stop', 'ignore'], ['image', ['linux', ['kernel', '/boot/vmlinuz-2.6.18-xen'], ['ramdisk', '/home/unisys/xen-3.1-testing.hg/tools/xm-test/ramdisk/initrd.img'], ['root', '/dev/ram0'], ['args', 'ramdisk_size=3561']]]])

[2007-10-15 09:06:48 6447] DEBUG (XendDomainInfo:1506) XendDomainInfo.constructDomain

[2007-10-15 09:06:49 6447] DEBUG (balloon:116) Balloon: 242725968 KiB free; need 2048; done.

[2007-10-15 09:06:49 6447] ERROR (XendDomainInfo:424) VM start failed

Traceback (most recent call last):

  File "/home/unisys/xen-3.1-testing.hg/dist/install/usr/lib64/python/xen/xend/XendDomainInfo.py", line 403, in start

    XendTask.log_progress(0, 30, self._constructDomain)

  File "/home/unisys/xen-3.1-testing.hg/dist/install/usr/lib64/python/xen/xend/XendTask.py", line 209, in log_progress

    retval = func(*args, **kwds)

  File "/home/unisys/xen-3.1-testing.hg/dist/install/usr/lib64/python/xen/xend/XendDomainInfo.py", line 1529, in _constructDomain

    hvm = int(hvm))

Error: (12, 'Cannot allocate memory')

 

Xm-test default for domain size was 64M; the README recommends increasing the domain size if there are memory errors, so I tried 128M, 256M and 512M.  When I reboot the host with 192gb, leaving the domain memory size as 512M, the test does not fail. 

 

Any ideas why adding the extra host memory causes the test to fail?

 

Thanks,

Sue Krysan

Linux Systems Group

Unisys Corporation

 

 

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