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

Message ID 20240909145413.3748429-1-peterx@redhat.com (mailing list archive)
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Series KVM: Dynamic sized memslots array | expand

Message

Peter Xu Sept. 9, 2024, 2:54 p.m. UTC 
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(-)