Re: [libvirt] [PATCH] docs: correct setmem text plus expand setmaxmem text
2011/1/19 Justin Clift <jclift(a)redhat.com>:
This completes the man page updates required for BZ # 622534:
https://bugzilla.redhat.com/show_bug.cgi?id=622534
-Change the maximum memory allocation limit in the guest domain. This
should
-not change the current memory use. The memory limit is specified in
-kilobytes.
+Change the maximum memory allocation limit for an active guest domain.
+
+Some hypervisors require a larger granularity than kilobytes, and requests
+that are not an even multiple will either be rounded down or rejected. For
+example, vSphere/ESX rejects the parameter unless the kB argument is evenly
+divisible by 1024 (that is, the kB argument happens to represent megabytes).
Actually vSphere/ESX truncates in this case. It rejects in other cases
(virsh define).
As Dan suggested, I might change this to round up.
Matthias