On Wed, 2015-12-09 at 16:09 +0000, Ian Jackson wrote: > > + * The child must open a new handle if they want to interact with > > + * gnttab. > > * > > - * Return an fd onto the grant table driver. Logs errors. > > + * A child may safely call xengnttab_close() on a xengnttab_handle > > + * inherited from a parent and this will safely reclaim any virtual > > + * address space used by mappings associated with that handle. > > Is this actually true ? Normally close() on an fd does not munmap > anything mmapped from the fd.
Uh yes, I was talking rubbish here, unless the drivers are more magic than I think they are. So what is the answer? That such memory is wasted and irrecovable until exec? See also the discussion beneath Wei's reply. Ack to all other feedback. > > + * Because there are no notifications when the page is swapped > > + * in, wait a bit before retrying, and hope that the page will > > + * arrive eventually. > > WTF. But not a blocker. Quite. A feature of much of the paging code AFAICT... > > > Ian. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
