CVSROOT: /cvs
Module name: src
Changes by: bl...@cvs.openbsd.org 2022/11/23 12:48:36
Modified files:
sys/arch/amd64/amd64: Tag: OPENBSD_7_2 vmm.c
Log message:
vmm(4): allocate reference for vm and vcpu SLISTs
Mischa Peters reported a performance regression in 7.2 when hosting
numerous guests under vmm(4). While iterating through the list of
vms during servicing an ioctl, vmm was triggering excessive wakeup
calls due to hitting zero refcnt.
Much guidance from dlg@ and testing from Mischa. OK mlarkin@.
from dv@
vmm(4): remove locking in vmm_intr_pending
Removes a lock around an atomic write; this lock was causing slowdowns
since the lock being requested is nearly always unavailable because it
is held while the VM is running.
Noticed by claudio@, help from mpi@, dlg@ and claudio@.
ok dv
from mlarkin@
this is errata/7.2/006_vmm.patch.sig
