[v3] KVM: Dynamic sized memslots array

[PATCH v3 0/4] KVM: Dynamic sized memslots array

Peter Xu posted 4 patches 2 months, 2 weeks ago

Diff against v1 v2 v4
Download series mbox

There is a newer version of this series

include/sysemu/kvm_int.h |   7 ++-
accel/kvm/kvm-all.c      | 117 +++++++++++++++++++++++++++++++--------
accel/kvm/trace-events   |   1 +
3 files changed, 99 insertions(+), 26 deletions(-)

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[PATCH v3 0/4] KVM: Dynamic sized memslots array

Posted by Peter Xu 2 months, 2 weeks ago

v3:
- In kvm_get_free_slot(), avoid re-search when slots array grows [Juraj]

v1: https://lore.kernel.org/r/20240904191635.3045606-1-peterx@redhat.com
v2: https://lore.kernel.org/r/20240904223510.3519358-1-peterx@redhat.com

This series make KVM memslots to be allocated dynamically in QEMU.  It
fixes a migration performance regression that I observed, reducing precopy
dirty sync process from ~86ms to ~3ms each time.

Patch 1 is the fix to the problem, while the rest three patches are
cleanups.

Thanks,

Peter Xu (4):
  KVM: Dynamic sized kvm memslots array
  KVM: Define KVM_MEMSLOTS_NUM_MAX_DEFAULT
  KVM: Rename KVMMemoryListener.nr_used_slots to nr_slots_used
  KVM: Rename KVMState->nr_slots to nr_slots_max

 include/sysemu/kvm_int.h |   7 ++-
 accel/kvm/kvm-all.c      | 117 +++++++++++++++++++++++++++++++--------
 accel/kvm/trace-events   |   1 +
 3 files changed, 99 insertions(+), 26 deletions(-)

-- 
2.45.0