"Michael S. Tsirkin" <[email protected]> writes: > Add pghint_t, a bitwise type for communicating page allocation hints > between the allocator and callers. Define PGHINT_ZEROED to indicate > that the allocated page contents are known to be zero. > > Add _hints variants of the allocation functions that accept a > pghint_t *hints output parameter: > > vma_alloc_folio_hints() -> folio_alloc_mpol_hints (internal) > -> __alloc_frozen_pages_hints() > > The existing APIs are unchanged and continue to work without hints. > For now, hints is always initialized to 0. A subsequent patch will > set PGHINT_ZEROED when the page was pre-zeroed by the host.
Why do we need this feature? Is there any performance impact? If so, please provide some performance data. [snip] --- Best Regards, Huang, Ying
