On 4/10/2024 3:22 AM, David Hildenbrand wrote:
We can now read the mapcount of large folios very efficiently. Use it to improve our handling of partially-mappable folios, falling back to making a guess only in case the folio is not "obviously mapped shared". We can now better detect partially-mappable folios where the first page is not mapped as "mapped shared", reducing "false negatives"; but false negatives are still possible. While at it, fixup a wrong comment (false positive vs. false negative) for KSM folios. Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Yin Fengwei <fengwei.yin@xxxxxxxxx>
