Displaying 20 results from an estimated 53 matches for "get_mergeable_buf_len".
2017 Mar 29
1
[PATCH] virtio_net: fix support for small rings
...+ /* Min single buffer size for mergeable buffers case. */
+ unsigned int min_buf_len;
+
/* Name of this receive queue: input.$index */
char name[40];
};
@@ -894,13 +897,14 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
return err;
}
-static unsigned int get_mergeable_buf_len(struct ewma_pkt_len *avg_pkt_len)
+static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
+ struct ewma_pkt_len *avg_pkt_len)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
unsigned int len;
len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_p...
2017 Mar 29
1
[PATCH] virtio_net: fix support for small rings
...+ /* Min single buffer size for mergeable buffers case. */
+ unsigned int min_buf_len;
+
/* Name of this receive queue: input.$index */
char name[40];
};
@@ -894,13 +897,14 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
return err;
}
-static unsigned int get_mergeable_buf_len(struct ewma_pkt_len *avg_pkt_len)
+static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
+ struct ewma_pkt_len *avg_pkt_len)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
unsigned int len;
len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_p...
2017 Mar 29
1
[PATCH v2] virtio_net: fix support for small rings
...+ /* Min single buffer size for mergeable buffers case. */
+ unsigned int min_buf_len;
+
/* Name of this receive queue: input.$index */
char name[40];
};
@@ -894,13 +898,14 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
return err;
}
-static unsigned int get_mergeable_buf_len(struct ewma_pkt_len *avg_pkt_len)
+static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
+ struct ewma_pkt_len *avg_pkt_len)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
unsigned int len;
len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_p...
2017 Mar 29
1
[PATCH v2] virtio_net: fix support for small rings
...+ /* Min single buffer size for mergeable buffers case. */
+ unsigned int min_buf_len;
+
/* Name of this receive queue: input.$index */
char name[40];
};
@@ -894,13 +898,14 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
return err;
}
-static unsigned int get_mergeable_buf_len(struct ewma_pkt_len *avg_pkt_len)
+static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
+ struct ewma_pkt_len *avg_pkt_len)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
unsigned int len;
len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_p...
2018 Mar 02
6
[PATCH net V2] virtio-net: re enable XDP_REDIRECT for mergeable buffer
...ue;
+ if (unlikely(xdp_page != page))
+ goto err_xdp;
+ rcu_read_unlock();
+ goto xdp_xmit;
default:
bpf_warn_invalid_xdp_action(act);
case XDP_ABORTED:
@@ -1013,13 +1029,18 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
}
static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
- struct ewma_pkt_len *avg_pkt_len)
+ struct ewma_pkt_len *avg_pkt_len,
+ unsigned int room)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
unsigned int len;
- len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_pkt_len),...
2018 Mar 02
6
[PATCH net V2] virtio-net: re enable XDP_REDIRECT for mergeable buffer
...ue;
+ if (unlikely(xdp_page != page))
+ goto err_xdp;
+ rcu_read_unlock();
+ goto xdp_xmit;
default:
bpf_warn_invalid_xdp_action(act);
case XDP_ABORTED:
@@ -1013,13 +1029,18 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
}
static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
- struct ewma_pkt_len *avg_pkt_len)
+ struct ewma_pkt_len *avg_pkt_len,
+ unsigned int room)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
unsigned int len;
- len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_pkt_len),...
2018 Mar 02
0
[PATCH net V2] virtio-net: re enable XDP_REDIRECT for mergeable buffer
...goto err_xdp;
> + rcu_read_unlock();
> + goto xdp_xmit;
> default:
> bpf_warn_invalid_xdp_action(act);
> case XDP_ABORTED:
> @@ -1013,13 +1029,18 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
> }
>
> static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
> - struct ewma_pkt_len *avg_pkt_len)
> + struct ewma_pkt_len *avg_pkt_len,
> + unsigned int room)
> {
> const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
> unsigned int len;
>
> - len = hdr_len + clamp_t(unsig...
2018 Mar 02
2
[PATCH net] virtio-net: re enable XDP_REDIRECT for mergeable buffer
...ue;
+ if (unlikely(xdp_page != page))
+ goto err_xdp;
+ rcu_read_unlock();
+ goto xdp_xmit;
default:
bpf_warn_invalid_xdp_action(act);
case XDP_ABORTED:
@@ -1013,13 +1030,18 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
}
static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
- struct ewma_pkt_len *avg_pkt_len)
+ struct ewma_pkt_len *avg_pkt_len,
+ unsigned int room)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
unsigned int len;
- len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_pkt_len),...
2018 Mar 02
2
[PATCH net] virtio-net: re enable XDP_REDIRECT for mergeable buffer
...ue;
+ if (unlikely(xdp_page != page))
+ goto err_xdp;
+ rcu_read_unlock();
+ goto xdp_xmit;
default:
bpf_warn_invalid_xdp_action(act);
case XDP_ABORTED:
@@ -1013,13 +1030,18 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
}
static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
- struct ewma_pkt_len *avg_pkt_len)
+ struct ewma_pkt_len *avg_pkt_len,
+ unsigned int room)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
unsigned int len;
- len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_pkt_len),...
2018 Mar 01
0
[PATCH net-next 1/2] virtio-net: re enable XDP_REDIRECT for mergeable buffer
...n);
+ if (skb_xdp)
+ head_skb = virtnet_skb_xdp(rq, head_skb);
+ else
+ ewma_pkt_len_add(&rq->mrg_avg_pkt_len, head_skb->len);
+
return head_skb;
err_xdp:
@@ -1013,13 +1026,18 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
}
static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
- struct ewma_pkt_len *avg_pkt_len)
+ struct ewma_pkt_len *avg_pkt_len,
+ unsigned int room)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
unsigned int len;
- len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_pkt_len),...
2018 Mar 01
1
[PATCH net-next 1/2] virtio-net: re enable XDP_REDIRECT for mergeable buffer
...q, head_skb);
> + else
> + ewma_pkt_len_add(&rq->mrg_avg_pkt_len, head_skb->len);
> +
> return head_skb;
>
> err_xdp:
> @@ -1013,13 +1026,18 @@ static int add_recvbuf_big(struct virtnet_info *vi, struct receive_queue *rq,
> }
>
> static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
> - struct ewma_pkt_len *avg_pkt_len)
> + struct ewma_pkt_len *avg_pkt_len,
> + unsigned int room)
> {
> const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
> unsigned int len;
>
> - len = hdr_len + clamp_t(unsig...
2014 Jan 16
0
[PATCH net-next v4 6/6] virtio-net: initial rx sysfs support, export mergeable rx buffer size
...rtio_net.c
index 3e82311..968eacd 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -604,18 +604,25 @@ static int add_recvbuf_big(struct receive_queue *rq, gfp_t gfp)
return err;
}
-static int add_recvbuf_mergeable(struct receive_queue *rq, gfp_t gfp)
+static unsigned int get_mergeable_buf_len(struct ewma *avg_pkt_len)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
+ unsigned int len;
+
+ len = hdr_len + clamp_t(unsigned int, ewma_read(avg_pkt_len),
+ GOOD_PACKET_LEN, PAGE_SIZE - hdr_len);
+ return ALIGN(len, MERGEABLE_BUFFER_ALIGN);
+}
+
+static int add_recvbuf_m...
2018 Mar 01
7
[PATCH net-next 0/2] virtio-net: re enable XDP_REDIRECT for mergeable buffer
Hi:
This series tries to re-enable XDP_REDIRECT for mergeable buffer which
was removed since commit 7324f5399b06 ("virtio_net: disable
XDP_REDIRECT in receive_mergeable() case"). Main concerns are:
- not enough tailroom was reserved which breaks cpumap
- complex logic like EWMA and linearizing during XDP processing
Fix those by:
- reserve enough tailroom during refill
- disable EWMA
2018 Mar 01
7
[PATCH net-next 0/2] virtio-net: re enable XDP_REDIRECT for mergeable buffer
Hi:
This series tries to re-enable XDP_REDIRECT for mergeable buffer which
was removed since commit 7324f5399b06 ("virtio_net: disable
XDP_REDIRECT in receive_mergeable() case"). Main concerns are:
- not enough tailroom was reserved which breaks cpumap
- complex logic like EWMA and linearizing during XDP processing
Fix those by:
- reserve enough tailroom during refill
- disable EWMA
2014 Jan 16
0
[PATCH net-next v3 5/5] virtio-net: initial rx sysfs support, export mergeable rx buffer size
...kt_len, head_skb->len);
+ write_seqcount_end(&rq->sysfs_seq);
return head_skb;
err_skb:
@@ -604,18 +613,29 @@ static int add_recvbuf_big(struct receive_queue *rq, gfp_t gfp)
return err;
}
-static int add_recvbuf_mergeable(struct receive_queue *rq, gfp_t gfp)
+static unsigned int get_mergeable_buf_len(struct ewma *avg_pkt_len)
{
const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
+ unsigned int len;
+
+ len = hdr_len + clamp_t(unsigned int, ewma_read(avg_pkt_len),
+ GOOD_PACKET_LEN, PAGE_SIZE - hdr_len);
+ return ALIGN(len, MERGEABLE_BUFFER_ALIGN);
+}
+
+static int add_recvbuf_m...
2014 Jan 16
2
[PATCH net-next v3 5/5] virtio-net: initial rx sysfs support, export mergeable rx buffer size
...an't sysfs simply disable softirq while it's reading the value?
> @@ -604,18 +613,29 @@ static int add_recvbuf_big(struct receive_queue *rq, gfp_t gfp)
> return err;
> }
>
> -static int add_recvbuf_mergeable(struct receive_queue *rq, gfp_t gfp)
> +static unsigned int get_mergeable_buf_len(struct ewma *avg_pkt_len)
> {
> const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
> + unsigned int len;
> +
> + len = hdr_len + clamp_t(unsigned int, ewma_read(avg_pkt_len),
> + GOOD_PACKET_LEN, PAGE_SIZE - hdr_len);
> + return ALIGN(len, MERGEABLE_BUFFER_ALI...
2014 Jan 16
2
[PATCH net-next v3 5/5] virtio-net: initial rx sysfs support, export mergeable rx buffer size
...an't sysfs simply disable softirq while it's reading the value?
> @@ -604,18 +613,29 @@ static int add_recvbuf_big(struct receive_queue *rq, gfp_t gfp)
> return err;
> }
>
> -static int add_recvbuf_mergeable(struct receive_queue *rq, gfp_t gfp)
> +static unsigned int get_mergeable_buf_len(struct ewma *avg_pkt_len)
> {
> const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
> + unsigned int len;
> +
> + len = hdr_len + clamp_t(unsigned int, ewma_read(avg_pkt_len),
> + GOOD_PACKET_LEN, PAGE_SIZE - hdr_len);
> + return ALIGN(len, MERGEABLE_BUFFER_ALI...
2017 Jun 01
4
[PATCH] virtio_net: lower limit on buffer size
...hypervisor bug.
drivers/net/virtio_net.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 87b5c20..60abb5d 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -842,7 +842,7 @@ static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
unsigned int len;
len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_pkt_len),
- rq->min_buf_len - hdr_len, PAGE_SIZE - hdr_len);
+ rq->min_buf_len, PAGE_SIZE - hdr_len);
return ALIGN(len, L1_CACHE_BYTES);
}
@@ -2039,7 +2039,8 @@ static unsi...
2017 Jun 01
4
[PATCH] virtio_net: lower limit on buffer size
...hypervisor bug.
drivers/net/virtio_net.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 87b5c20..60abb5d 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -842,7 +842,7 @@ static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
unsigned int len;
len = hdr_len + clamp_t(unsigned int, ewma_pkt_len_read(avg_pkt_len),
- rq->min_buf_len - hdr_len, PAGE_SIZE - hdr_len);
+ rq->min_buf_len, PAGE_SIZE - hdr_len);
return ALIGN(len, L1_CACHE_BYTES);
}
@@ -2039,7 +2039,8 @@ static unsi...
2020 May 06
1
[PATCH net-next 2/2] virtio-net: fix the XDP truesize calculation for mergeable buffers
...Cc: Jesper Dangaard Brouer<brouer at redhat.com>
> > > Signed-off-by: Jason Wang<jasowang at redhat.com>
> > Seems too aggressive, we do not use up the whole page for the size.
> >
> >
> >
>
> For XDP yes, we do:
>
> static unsigned int get_mergeable_buf_len(struct receive_queue *rq,
> ??? ??? ??? ??? ??? ? struct ewma_pkt_len *avg_pkt_len,
> ??? ??? ??? ??? ??? ? unsigned int room)
> {
> ??? const size_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
> ??? unsigned int len;
>
> ??? if (room)
> ??? ??? return PAGE_SIZE - ro...