On 28/02/2019 02:03, Igor Druzhinin wrote: > Zero-copy callback flag is not yet set on frag list skb at the moment > xenvif_handle_frag_list() returns -ENOMEM. This eventually results in > leaking grant ref mappings since xenvif_zerocopy_callback() is never > called for these fragments. Those eventually build up and cause Xen > to kill Dom0 as the slots get reused for new mappings.
Its worth pointing out what (debug) Xen notices is dom0 performing implicit grant unmap. ~Andrew
