Management of hugepages

[rokups]

A useful function would be management of hugepages. Some VMs may use them and some may not. vfio-isolate could read a VM xml, determine how much hugepages are needed (if any) and allocate/free appropriate amount before VM starts or after it stops.

[spheenik]

I agree!

[spheenik]

Hey rokups, it's a coincidence this came up again today, but I have not used "preallocated" hugepages on my system for a while, because it would sometimes not allocate the amount I requested, and subsequently not start the VM. At that time I read about "transparent hugepages", and it works:

some reddit conversation about it

Maybe you are also unaware of this feature? Or is there a reason you want to allocate the amount first?

[spheenik]

some more relevant conversation

[rokups]

I am aware. For a while I was using thp. My interest in hugepages was reignited after virtiofs driver for windows was released. Hugepages are one of requirements.

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On August 22, 2020 10:08:41 Martin Schrodt ***@***.***> wrote: some more relevant conversation — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[spheenik]

There is a virtiofs driver for Windows?

[rokups]

It landed only recently. So far i was unable to get it working reliably. But yeah its there.