Keir Fraser 7d9a0273c4 KVM: Avoid synchronize_srcu() in kvm_io_bus_register_dev() ...

Device MMIO registration may happen quite frequently during VM boot,
and the SRCU synchronization each time has a measurable effect
on VM startup time. In our experiments it can account for around 25%
of a VM's startup time.

Replace the synchronization with a deferred free of the old kvm_io_bus
structure.

Tested-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Keir Fraser <keirf@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

2025-09-15 10:55:23 +01:00

..

kvm

KVM: Avoid synchronize_srcu() in kvm_io_bus_register_dev()

2025-09-15 10:55:23 +01:00

lib

irqbypass: Require producers to pass in Linux IRQ number during registration

2025-06-20 13:52:41 -07:00

Makefile

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