On 11/9/21 23:23, Sean Christopherson wrote:
The buffer is purely a KVM software construct, i.e. there's no need for it to be physically contiguous, and at a max allowed size of 16kb it's just large enough that kzalloc() could feasibly fail due to memory fragmentation.
That isn't entirely correct, as kzalloc() won't really fail for requests up to 32kb, i.e. order <= PAGE_ALLOC_COSTLY_ORDER. However, the reasoning is correct so I queued the patches.
Paolo
