[v2] KVM: Dynamic sized memslots array

[PATCH v2 0/4] KVM: Dynamic sized memslots array

Peter Xu posted 4 patches 2 months, 2 weeks ago

Diff against v1 v3 v4
Download series mbox

There is a newer version of this series

include/sysemu/kvm_int.h |   7 +--
accel/kvm/kvm-all.c      | 111 +++++++++++++++++++++++++++++++--------
accel/kvm/trace-events   |   1 +
3 files changed, 93 insertions(+), 26 deletions(-)

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[PATCH v2 0/4] KVM: Dynamic sized memslots array

Posted by Peter Xu 2 months, 2 weeks ago

v2:
- Reordered patches, make the fix patch cc:stable
- s/NUM/NR/ for the newly introduced macros [DavidH]
- Added kvm_slots_double() wrapper [DavidH]

v1: https://lore.kernel.org/r/20240904191635.3045606-1-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      | 111 +++++++++++++++++++++++++++++++--------
 accel/kvm/trace-events   |   1 +
 3 files changed, 93 insertions(+), 26 deletions(-)

-- 
2.45.0