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According to the spec, if the VIRTIO_RING_F_EVENT_IDX feature bit is
negotiated the driver MUST set flags to 0. Not dirtying the available
ring in virtqueue_disable_cb also has a minor positive performance
impact, improving L1 dcache load missed by ~0.5% in vring_bench.
Writes to the used event field (vring_used_event) are still unconditional.
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: <stable@vger.kernel.org> #
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.. | ||
config.c | ||
Kconfig | ||
Makefile | ||
virtio_balloon.c | ||
virtio_input.c | ||
virtio_mmio.c | ||
virtio_pci_common.c | ||
virtio_pci_common.h | ||
virtio_pci_legacy.c | ||
virtio_pci_modern.c | ||
virtio_ring.c | ||
virtio.c |