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

..

async_pf.c

Revert "KVM: async_pf: avoid recursive flushing of work items"

2024-06-03 08:55:55 -07:00

async_pf.h

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504

2019-06-19 17:09:56 +02:00

binary_stats.c

KVM: stats: remove dead stores

2021-08-13 03:35:15 -04:00

coalesced_mmio.c

KVM: Clean up coalesced MMIO ring full check

2024-08-29 19:38:33 -07:00

coalesced_mmio.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

dirty_ring.c

KVM: Assert that slots_lock is held when resetting per-vCPU dirty rings

2025-06-20 13:41:04 -07:00

eventfd.c

KVM: Drop sanity check that per-VM list of irqfds is unique

2025-06-23 09:50:59 -07:00

guest_memfd.c

KVM: guest_memfd: Remove redundant kvm_gmem_getattr implementation

2025-06-25 13:42:33 -07:00

irqchip.c

KVM: x86: Trigger I/O APIC route rescan in kvm_arch_irq_routing_update()

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

Kconfig

KVM: Allow building irqbypass.ko as as module when kvm.ko is a module

2025-04-04 07:07:40 -04:00

kvm_main.c

KVM: Avoid synchronize_srcu() in kvm_io_bus_register_dev()

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

kvm_mm.h

KVM: Pin (as in FOLL_PIN) pages during kvm_vcpu_map()

2024-10-25 12:58:00 -04:00

Makefile.kvm

KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory

2023-11-14 08:01:03 -05:00

pfncache.c

KVM: pfncache: Precisely track refcounted pages

2024-10-25 12:57:59 -04:00

vfio.c

VFIO: KVM: x86: Drop kvm_arch_{start,end}_assignment()

2025-06-25 09:51:33 -07:00

vfio.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00