search for: 1191,27

...RIFY_WRITE, packed, num * sizeof(*packed)) && + access_ok(VERIFY_READ, driver_event, sizeof(*driver_event)) && + access_ok(VERIFY_WRITE, device_event, sizeof(*device_event)); } static int vq_access_ok_split(struct vhost_virtqueue *vq, unsigned int num, @@ -1186,14 +1191,27 @@ static bool iotlb_access_ok(struct vhost_virtqueue *vq, return true; } -int vq_iotlb_prefetch(struct vhost_virtqueue *vq) +int vq_iotlb_prefetch_packed(struct vhost_virtqueue *vq) +{ + int num = vq->num; + + return iotlb_access_ok(vq, VHOST_ACCESS_RO, (u64)(uintptr_t)vq->desc, +...

Hi all: This RFC implement packed ring layout. The code were tested with Tiwei's RFC V3 ahttps://lkml.org/lkml/2018/4/25/34. Some fixups and tweaks were needed on top of Tiwei's code to make it run for event index. Pktgen reports about 20% improvement on PPS (event index is off). More testing is ongoing. Notes for tester: - Start from this version, vhost need qemu co-operation to work

Hi all: This RFC implement packed ring layout. The code were tested with Tiwei's RFC V3 ahttps://lkml.org/lkml/2018/4/25/34. Some fixups and tweaks were needed on top of Tiwei's code to make it run for event index. Pktgen reports about 20% improvement on PPS (event index is off). More testing is ongoing. Notes for tester: - Start from this version, vhost need qemu co-operation to work