On Fri, Jun 24, 2022 at 05:18:08PM +0000, Sean Christopherson wrote: > Buffer split_desc_cache, the cache used to allcoate rmap list entries, > only by the default cache capacity (currently 40), not by doubling the > minimum (513). Aliasing L2 GPAs to L1 GPAs is uncommon, thus eager page > splitting is unlikely to need 500+ entries. And because each object is a > non-trivial 128 bytes (see struct pte_list_desc), those extra ~500 > entries means KVM is in all likelihood wasting ~64kb of memory per VM. > > Link: https://lore.kernel.org/all/YrTDcrsn0%2F+alpzf@xxxxxxxxxx > Cc: David Matlack <dmatlack@xxxxxxxxxx> > Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> Thanks for the cleanups! Reviewed-by: David Matlack <dmatlack@xxxxxxxxxx>
