On 2/15/19 4:05 AM, Wang, Wei W wrote: > On Thursday, February 14, 2019 5:43 PM, David Hildenbrand wrote: >> Yes indeed, that is the important bit. They must not be put pack to the >> buddy before they have been processed by the hypervisor. But as the pages >> are not in the buddy, no one allocating a page will stumble over such a page >> and try to allocate it. Threads trying to allocate memory will simply pick >> another buddy page instead of "busy waiting" for that page to be finished >> reporting. > What if a guest thread try to allocate some pages but the buddy cannot satisfy > because all the pages are isolated? Would it be the same case that the guest thread > gets blocked by waiting all the isolated pages to get madvised by the host and > returned to the guest buddy, or even worse, some guest threads get killed due to oom? If you are referring to a situation when guest is under memory pressure then isolation request will fail and memory will not be reported/isolated. However, there can always be a corner case and we can definitely take that into consideration later. > > Best, > Wei -- Regards Nitesh
Attachment:
signature.asc
Description: OpenPGP digital signature
