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[0/4] KVM: Dynamic sized memslots array

Message ID 20240904191635.3045606-1-peterx@redhat.com
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Series KVM: Dynamic sized memslots array | expand

Message

Peter Xu Sept. 4, 2024, 7:16 p.m. UTC 
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 1,2,4 are mostly small cleanups, the major fix is in patch 3.

Thanks,

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

 include/sysemu/kvm_int.h |   7 +--
 accel/kvm/kvm-all.c      | 106 ++++++++++++++++++++++++++++++---------
 accel/kvm/trace-events   |   1 +
 3 files changed, 88 insertions(+), 26 deletions(-)