Hi Keir, just a curious question, will map_domain_page
return NULL when
fails on x86_32? If not, why?
thanks
I don't expect that it should ever fail. It's used for temporary
mappings (e.g., scope of a function) and so even though the mapping
space is finite, we shouldn't ever exhaust it.
So the unmap is not a must?
Can you explain the mechanism of garbage collection here?
Thanks
The unmap is a must. After unmap the mapping is put in a per-vcpu
lookup table to allow fast reuse. When it is evicted from that table
then it is freed.
Quite clear, thanks, this may be helpful to accelerate __entry().
-Xin
1 message in com.xensource.lists.xen-develRE: [Xen-devel] Re: Will map_domain_p...