Public bug reported:
Kindly help push this into Ubuntu 26.04 LTS which has changes to enable AVIC by
default. This addresses a performance degradation when VMs are launched in a
configuration that inhibits AVIC (default qemu config).
Patches:
b402ec851cb66e73ee35913c7d802bba820086b
KVM: SVM: Fix clearing IRQ window inhibit with nested guests
6563ddadd169cc6f509a75b3ff8354309dcb9080
KVM: SVM: Fix IRQ window inhibit handling across multiple vCPUs
5617dddcfa30129562d7028ec766797d8c345f36
KVM: SVM: Optimize IRQ window inhibit handling
fa78a514d632ed2428b7c573108d9658c00d536e
KVM: Isolate apicv_update_lock and apicv_nr_irq_window_req in a
cacheline
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2151807
Title:
[Ubuntu 26.04] Netperf performance is lower when AVIC is enabled but
inhibited, compared to AVIC being disabled
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