Linux shmem race corrupts page cache during hole punch
Fault-around can re-map large folios mid-punch, leaving stale mappings and exact 512-page RSS imbalances on production hosts.
By oops#shmem
Kernel keeps mTHP on when PMD-sized huge pages are missing
A new page-table helper lets multi-size THP stay available on CPUs that cannot back traditional PMD leaves.
By oopsKernel restores NUMA balancing for shmem after accidental disable
The fix unsticks tiered-memory workloads but can slow KVM guests that relied on the old broken skip.
By oops