Il 09/05/2013 10:54, liu ping fan ha scritto: > On Thu, May 9, 2013 at 4:44 PM, Michael S. Tsirkin <m...@redhat.com> wrote: >> On Thu, May 09, 2013 at 08:40:21AM +0800, Liu Ping Fan wrote: >>> From: Liu Ping Fan <pingf...@linux.vnet.ibm.com> >>> >>> Hosts threads which handle vring should have high MemoryListener priority >>> than kvm. For currently code, take the following scenario: >>> kvm_region_add() run earlier before vhost_region_add(), then in guest, >>> vring's desc[i] can refer to addressX in the new region known by guest. >>> But vhost does not know this new region yet, and the vring handler will >>> fail. >>> >>> Signed-off-by: Liu Ping Fan <pingf...@linux.vnet.ibm.com> >> >> Is this seen in testing, or are you describing a theorecitical >> scenario? Please make this clear in the commit log. >> > A theorecitical scenario. I think vcpu thread and vhost are async, > so we need this method to sync.
But why should this matter for hostmem? It doesn't communicate in any way with the hypervisor. Paolo
