search for: rxbuf

When vhost support VIRTIO_VSOCK_F_MRG_RXBUF feature, it will merge big packet into rx vq. Signed-off-by: Yiwen Jiang <jiangyiwen at huawei.com> --- drivers/vhost/vsock.c | 117 +++++++++++++++++++++++++++++++------- include/linux/virtio_vsock.h | 1 + include/uapi/linux/virtio_vsock.h | 5 ++ 3 files changed, 102...

When vhost support VIRTIO_VSOCK_F_MRG_RXBUF feature, it will merge big packet into rx vq. Signed-off-by: Yiwen Jiang <jiangyiwen at huawei.com> --- drivers/vhost/vsock.c | 117 +++++++++++++++++++++++++++++++------- include/linux/virtio_vsock.h | 1 + include/uapi/linux/virtio_vsock.h | 5 ++ 3 files changed, 102...

On 16-12-23 06:37 AM, Jason Wang wrote: > We don't put page during linearizing, the would cause leaking when > xmit through XDP_TX or the packet exceeds PAGE_SIZE. Fix them by > put page accordingly. Also decrease the number of buffers during > linearizing to make sure caller can free buffers correctly when packet > exceeds PAGE_SIZE. With this patch, we won't get OOM after

...ang wrote: > Merry Xmas and a Happy New year to all: > > This series tries to fixes several issues for virtio-net XDP which > could be categorized into several parts: > > - fix several issues during XDP linearizing > - allow csumed packet to work for XDP_PASS > - make EWMA rxbuf size estimation works for XDP > - forbid XDP when GUEST_UFO is support > - remove big packet XDP support > - add XDP support or small buffer > > Please see individual patches for details. > > Thanks > > Jason Wang (9): > virtio-net: remove the warning before XDP l...

...size that's twice larger than necessary > because of power of two requirements wastes cache. I don't know. Power of 2 ring size is pretty standard, I'd rather avoid the complication and the gratuitous difference with 1.0. If batching is mostly advisory (with exceptions such as mrg-rxbuf) I don't have any problem with it. Paolo

On 16-12-23 06:37 AM, Jason Wang wrote: > We don't put page during linearizing, the would cause leaking when > xmit through XDP_TX or the packet exceeds PAGE_SIZE. Fix them by > put page accordingly. Also decrease the number of buffers during > linearizing to make sure caller can free buffers correctly when packet > exceeds PAGE_SIZE. With this patch, we won't get OOM after

Merry Xmas and a Happy New year to all: This series tries to fixes several issues for virtio-net XDP which could be categorized into several parts: - fix several issues during XDP linearizing - allow csumed packet to work for XDP_PASS - make EWMA rxbuf size estimation works for XDP - forbid XDP when GUEST_UFO is support - remove big packet XDP support - add XDP support or small buffer Please see individual patches for details. Thanks Jason Wang (9): virtio-net: remove the warning before XDP linearizing virtio-net: correctly xmit linearized...

Merry Xmas and a Happy New year to all: This series tries to fixes several issues for virtio-net XDP which could be categorized into several parts: - fix several issues during XDP linearizing - allow csumed packet to work for XDP_PASS - make EWMA rxbuf size estimation works for XDP - forbid XDP when GUEST_UFO is support - remove big packet XDP support - add XDP support or small buffer Please see individual patches for details. Thanks Jason Wang (9): virtio-net: remove the warning before XDP linearizing virtio-net: correctly xmit linearized...

...ther avoid > the complication and the gratuitous difference with 1.0. I thought originally there's a reason 1.0 rings had to be powers of two but now I don't see why. OK, we can make it a feature flag later if we want to. > If batching is mostly advisory (with exceptions such as mrg-rxbuf) I > don't have any problem with it. > > Paolo

...ther avoid > the complication and the gratuitous difference with 1.0. I thought originally there's a reason 1.0 rings had to be powers of two but now I don't see why. OK, we can make it a feature flag later if we want to. > If batching is mostly advisory (with exceptions such as mrg-rxbuf) I > don't have any problem with it. > > Paolo

On Wed, Feb 08, 2017 at 06:41:40PM +0100, Paolo Bonzini wrote: > > > On 08/02/2017 04:20, Michael S. Tsirkin wrote: > > * Scatter/gather support > > > > We can use 1 bit to chain s/g entries in a request, same as virtio 1.0: > > > > /* This marks a buffer as continuing via the next field. */ > > #define VRING_DESC_F_NEXT 1 > > > >

On Wed, Feb 08, 2017 at 06:41:40PM +0100, Paolo Bonzini wrote: > > > On 08/02/2017 04:20, Michael S. Tsirkin wrote: > > * Scatter/gather support > > > > We can use 1 bit to chain s/g entries in a request, same as virtio 1.0: > > > > /* This marks a buffer as continuing via the next field. */ > > #define VRING_DESC_F_NEXT 1 > > > >

On 2018/11/5 ??3:45, jiangyiwen wrote: > When vhost support VIRTIO_VSOCK_F_MRG_RXBUF feature, > it will merge big packet into rx vq. > > Signed-off-by: Yiwen Jiang <jiangyiwen at huawei.com> > --- > drivers/vhost/vsock.c | 117 +++++++++++++++++++++++++++++++------- > include/linux/virtio_vsock.h | 1 + > include/uapi/linux/virtio_v...

On 2018/11/6 11:43, Jason Wang wrote: > > On 2018/11/5 ??3:45, jiangyiwen wrote: >> When vhost support VIRTIO_VSOCK_F_MRG_RXBUF feature, >> it will merge big packet into rx vq. >> >> Signed-off-by: Yiwen Jiang <jiangyiwen at huawei.com> >> --- >> drivers/vhost/vsock.c | 117 +++++++++++++++++++++++++++++++------- >> include/linux/virtio_vsock.h | 1 + >>...

On 2018/11/6 11:43, Jason Wang wrote: > > On 2018/11/5 ??3:45, jiangyiwen wrote: >> When vhost support VIRTIO_VSOCK_F_MRG_RXBUF feature, >> it will merge big packet into rx vq. >> >> Signed-off-by: Yiwen Jiang <jiangyiwen at huawei.com> >> --- >> drivers/vhost/vsock.c | 117 +++++++++++++++++++++++++++++++------- >> include/linux/virtio_vsock.h | 1 + >>...

...dule_param(napi_weight, int, 0444); @@ -36,11 +37,15 @@ module_param(gso, bool, 0444); /* FIXME: MTU in config. */ #define GOOD_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN) -#define MERGE_BUFFER_LEN (ALIGN(GOOD_PACKET_LEN + \ - sizeof(struct virtio_net_hdr_mrg_rxbuf), \ - L1_CACHE_BYTES)) #define GOOD_COPY_LEN 128 +/* Weight used for the RX packet size EWMA. The average packet size is used to + * determine the packet buffer size when refilling RX rings. As the entire RX + * ring may be refilled at once, the weight is chosen so...

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

...444); > @@ -36,11 +37,15 @@ module_param(gso, bool, 0444); > > /* FIXME: MTU in config. */ > #define GOOD_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN) > -#define MERGE_BUFFER_LEN (ALIGN(GOOD_PACKET_LEN + \ > - sizeof(struct virtio_net_hdr_mrg_rxbuf), \ > - L1_CACHE_BYTES)) > #define GOOD_COPY_LEN 128 > > +/* Weight used for the RX packet size EWMA. The average packet size is used to > + * determine the packet buffer size when refilling RX rings. As the entire RX > + * ring may be refilled at...

...444); > @@ -36,11 +37,15 @@ module_param(gso, bool, 0444); > > /* FIXME: MTU in config. */ > #define GOOD_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN) > -#define MERGE_BUFFER_LEN (ALIGN(GOOD_PACKET_LEN + \ > - sizeof(struct virtio_net_hdr_mrg_rxbuf), \ > - L1_CACHE_BYTES)) > #define GOOD_COPY_LEN 128 > > +/* Weight used for the RX packet size EWMA. The average packet size is used to > + * determine the packet buffer size when refilling RX rings. As the entire RX > + * ring may be refilled at...