This series switches kvm_io_device to slots_lock from kvm->lock mutex, and uses that to rework io bus API. This takes less locks on data path, and uses less lines of code. These changes will also be useful to serve as basis for Greg's iosignalfd work. Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx> --- This works for me, but please review carefully. Changes since v4: Typo fix Changes since v3: Fix bug noticed by Marcelo Switch pit creation to slots_lock Add unlocked variant for bus changes: in use by pit More documentation Changes since v2: I have split the patch and reworked along the lines suggested by Avi. Michael S. Tsirkin (6): kvm: document locking for kvm_io_device_ops kvm: switch coalesced mmio changes to slots_lock kvm: switch pit creation to slots_lock kvm: convert bus to slots_lock kvm: remove in_range from io devices kvm: document lock nesting rule arch/ia64/kvm/kvm-ia64.c | 28 +++-------- arch/x86/kvm/i8254.c | 54 +++++++++++---------- arch/x86/kvm/i8259.c | 22 +++++---- arch/x86/kvm/lapic.c | 44 ++++++++--------- arch/x86/kvm/x86.c | 114 +++++++++++++------------------------------- include/linux/kvm_host.h | 11 +++- virt/kvm/coalesced_mmio.c | 28 +++++------ virt/kvm/ioapic.c | 24 +++++---- virt/kvm/iodev.h | 42 +++++++--------- virt/kvm/kvm_main.c | 38 +++++++++++---- 10 files changed, 183 insertions(+), 222 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
