[xenpreview-dev] dom0-min-mem parameter in xend-config.sxp

[Krysan, Susan]

We boot our 128gb ES7000/one with dom0_mem=512M because without it, it
takes a while for dom0 to balloon down from 128gb when creating larger
domUs.  I would like to prevent users from ballooning dom0 down any
lower than 512, so I have set the value of dom0-min-mem to 512 and
rebooted.  When I do xm mem-set 0 256, the system starts to balloon down
(as seen using xm top) and then it freezes and becomes unusable,
requiring a reboot.  Shouldn't the dom0-min-mem value prevent dom0 from
attempting to balloon down to 256 when xm command is used?  Or does it
only control the minimum value for dom0 when the kernel determines it
needs to balloon?

 

Thanks,

Sue Krysan

Linux Systems Group

Unisys Corporation

 

 

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