On Tue, Jun 21, 2016 at 11:53 AM, Berillions <berilli...@gmail.com> wrote:
> When i said in my message "real 8Gb Memory Ram", it means that I have 2 > slots each one which contain 4Gb Memory Ram. > "real 12Gb Memory Ram", it means that I have 3 slots each one which > contain 4Gb Memory Ram. > > And yes, i created Hugepages for the VM with the Debian Wiki ( > https://wiki.debian.org/Hugepages). > For 2048Mb allocate to the VM, i set "vm.nr_hugepages" to 4096. > > But i can't set 8192 to "vm.nr_hugepages" and set 4096MB for the Guest, I > have not enough memory for the Host (I can use the host but if i launch > Virt-Manager + VM, 99% of Memory Ram is used so the host freeze) > You do realize that the default hugepage size on x86 is 2MB, right? So you cannot allocate 8192 hugepages because that would be 16GB on your 12GB system. At 4096, you already have enough hugepages to run an 8GB VM. Maybe you're seeing problems because you're making your poor system swap like mad while at the same time not even using all the hugepages you're allocating.
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