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authorJan Kiszka <jan.kiszka@siemens.com>2010-11-16 22:30:03 +0100
committerAvi Kivity <avi@redhat.com>2011-01-12 11:29:20 +0200
commit0645211c43df0b96c51e12980066b3227e10b164 (patch)
tree2c23ea65e07b9481681eb6bb7cc5d7d2fa109917 /fs/mpage.c
parent0c106b5aaa727c7f508828e94cff4a98874f930c (diff)
downloadop-kernel-dev-0645211c43df0b96c51e12980066b3227e10b164.zip
op-kernel-dev-0645211c43df0b96c51e12980066b3227e10b164.tar.gz
KVM: Switch assigned device IRQ forwarding to threaded handler
This improves the IRQ forwarding for assigned devices: By using the kernel's threaded IRQ scheme, we can get rid of the latency-prone work queue and simplify the code in the same run. Moreover, we no longer have to hold assigned_dev_lock while raising the guest IRQ, which can be a lenghty operation as we may have to iterate over all VCPUs. The lock is now only used for synchronizing masking vs. unmasking of INTx-type IRQs, thus is renames to intx_lock. Acked-by: Alex Williamson <alex.williamson@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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