Re: [PATCH 0/5] kvm: memslots lookup optimization

Paolo Bonzini
2014-12-01T17:38:39Z

On 01/12/2014 18:29, Igor Mammedov wrote:
> Series speed-ups GFN to memslot lookup time by:
> * introducing LRU cache, which improves looukup time for
> same slot workload (typically boot time of Windows and Linux guest)
> * switching to binary search for GFN to memslot lookup,
> improving lookup time with large amount of memory slots
>
> Igor Mammedov (5):
> kvm: update_memslots: drop not needed check for the same number of
> pages
> kvm: update_memslots: drop not needed check for the same slot
> kvm: search_memslots: add simple LRU memslot caching
> kvm: change memslot sorting rule from size to GFN
> kvm: optimize GFN to memslot lookup with large slots amount
>
> include/linux/kvm_host.h | 28 +++++++++++++++++++++++-----
> virt/kvm/kvm_main.c | 46 ++++++++++++++++++++++++++--------------------
> 2 files changed, 49 insertions(+), 25 deletions(-)
>

Applied patches 1-3 for now, I'm not in the mood for proving that the
binary search is correct. :)

Paolo