Displaying 5 results from an estimated 5 matches for "vhost_uninit_vq_vmap".
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vhost_uninit_vq_vmaps
2019 Mar 06
0
[RFC PATCH V2 5/5] vhost: access vq metadata through kernel virtual address
...(PAGE_SIZE - 1));
+ map->unmap_addr = vaddr;
+ map->npages = npages;
+ map->pages = pages;
+
+err_gup:
+ /* Don't pin pages, mmu notifier will notify us about page
+ * migration.
+ */
+ if (npinned > 0)
+ release_pages(pages, npinned);
+err_uaddr:
+ return err;
+}
+
+static void vhost_uninit_vq_vmaps(struct vhost_virtqueue *vq)
+{
+ vhost_uninit_vmap(&vq->avail_ring);
+ vhost_uninit_vmap(&vq->desc_ring);
+ vhost_uninit_vmap(&vq->used_ring);
+}
+
+static int vhost_setup_avail_vmap(struct vhost_virtqueue *vq,
+ unsigned long avail)
+{
+ return vhost_init_vmap(vq->dev...
2019 Mar 06
2
[RFC PATCH V2 5/5] vhost: access vq metadata through kernel virtual address
...= npages;
> + map->pages = pages;
> +
> +err_gup:
> + /* Don't pin pages, mmu notifier will notify us about page
> + * migration.
> + */
> + if (npinned > 0)
> + release_pages(pages, npinned);
> +err_uaddr:
> + return err;
> +}
> +
> +static void vhost_uninit_vq_vmaps(struct vhost_virtqueue *vq)
> +{
> + vhost_uninit_vmap(&vq->avail_ring);
> + vhost_uninit_vmap(&vq->desc_ring);
> + vhost_uninit_vmap(&vq->used_ring);
> +}
> +
> +static int vhost_setup_avail_vmap(struct vhost_virtqueue *vq,
> + unsigned long avail...
2019 Mar 06
2
[RFC PATCH V2 5/5] vhost: access vq metadata through kernel virtual address
...= npages;
> + map->pages = pages;
> +
> +err_gup:
> + /* Don't pin pages, mmu notifier will notify us about page
> + * migration.
> + */
> + if (npinned > 0)
> + release_pages(pages, npinned);
> +err_uaddr:
> + return err;
> +}
> +
> +static void vhost_uninit_vq_vmaps(struct vhost_virtqueue *vq)
> +{
> + vhost_uninit_vmap(&vq->avail_ring);
> + vhost_uninit_vmap(&vq->desc_ring);
> + vhost_uninit_vmap(&vq->used_ring);
> +}
> +
> +static int vhost_setup_avail_vmap(struct vhost_virtqueue *vq,
> + unsigned long avail...
2019 Mar 06
12
[RFC PATCH V2 0/5] vhost: accelerate metadata access through vmap()
This series tries to access virtqueue metadata through kernel virtual
address instead of copy_user() friends since they had too much
overheads like checks, spec barriers or even hardware feature
toggling. This is done through setup kernel address through vmap() and
resigter MMU notifier for invalidation.
Test shows about 24% improvement on TX PPS. TCP_STREAM doesn't see
obvious improvement.
2019 Mar 06
12
[RFC PATCH V2 0/5] vhost: accelerate metadata access through vmap()
This series tries to access virtqueue metadata through kernel virtual
address instead of copy_user() friends since they had too much
overheads like checks, spec barriers or even hardware feature
toggling. This is done through setup kernel address through vmap() and
resigter MMU notifier for invalidation.
Test shows about 24% improvement on TX PPS. TCP_STREAM doesn't see
obvious improvement.