Displaying 20 results from an estimated 52 matches for "merge_buffer_len".
2013 Dec 17
0
[PATCH net-next 2/3] virtio-net: use per-receive queue page frag alloc for mergeable bufs
...int_set;
@@ -336,8 +339,8 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
int num_buf = hdr->mhdr.num_buffers;
struct page *page = virt_to_head_page(buf);
int offset = buf - page_address(page);
- struct sk_buff *head_skb = page_to_skb(rq, page, offset, len,
- MERGE_BUFFER_LEN);
+ int truesize = max_t(int, len, MERGE_BUFFER_LEN);
+ struct sk_buff *head_skb = page_to_skb(rq, page, offset, len, truesize);
struct sk_buff *curr_skb = head_skb;
if (unlikely(!curr_skb))
@@ -353,11 +356,6 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
dev->stat...
2014 Jan 16
0
[PATCH net-next v4 2/6] virtio-net: use per-receive queue page frag alloc for mergeable bufs
...t_set;
@@ -336,8 +334,8 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
int num_buf = hdr->mhdr.num_buffers;
struct page *page = virt_to_head_page(buf);
int offset = buf - page_address(page);
- struct sk_buff *head_skb = page_to_skb(rq, page, offset, len,
- MERGE_BUFFER_LEN);
+ unsigned int truesize = max_t(unsigned int, len, MERGE_BUFFER_LEN);
+ struct sk_buff *head_skb = page_to_skb(rq, page, offset, len, truesize);
struct sk_buff *curr_skb = head_skb;
if (unlikely(!curr_skb))
@@ -353,11 +351,6 @@ static struct sk_buff *receive_mergeable(struct net_device *dev...
2013 Nov 12
0
[PATCH net-next 3/4] virtio-net: use per-receive queue page frag alloc for mergeable bufs
...nt num_buf, len, offset, truesize;
num_buf = hdr->mhdr.num_buffers;
while (--num_buf) {
@@ -317,11 +320,7 @@ static int receive_mergeable(struct receive_queue *rq, struct sk_buff *head_skb)
head_skb->dev->stats.rx_length_errors++;
return -EINVAL;
}
- if (unlikely(len > MERGE_BUFFER_LEN)) {
- pr_debug("%s: rx error: merge buffer too long\n",
- head_skb->dev->name);
- len = MERGE_BUFFER_LEN;
- }
+ truesize = max_t(int, len, MERGE_BUFFER_LEN);
if (unlikely(num_skb_frags == MAX_SKB_FRAGS)) {
struct sk_buff *nskb = alloc_skb(0, GFP_ATOMIC);
if (unl...
2013 Nov 12
12
[PATCH net-next 1/4] virtio-net: mergeable buffer size should include virtio-net header
...ers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -36,7 +36,10 @@ module_param(csum, bool, 0444);
module_param(gso, bool, 0444);
/* FIXME: MTU in config. */
-#define MAX_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN)
+#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
#define VIRTNET_DRIVER_VERSION "1.0.0"
@@ -314,10 +317,10 @@ static int receive_mergeable(struct receive_q...
2013 Nov 12
12
[PATCH net-next 1/4] virtio-net: mergeable buffer size should include virtio-net header
...ers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -36,7 +36,10 @@ module_param(csum, bool, 0444);
module_param(gso, bool, 0444);
/* FIXME: MTU in config. */
-#define MAX_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN)
+#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
#define VIRTNET_DRIVER_VERSION "1.0.0"
@@ -314,10 +317,10 @@ static int receive_mergeable(struct receive_q...
2013 Dec 17
15
[PATCH net-next 1/3] net: allow > 0 order atomic page alloc in skb_page_frag_refill
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
2013 Dec 17
15
[PATCH net-next 1/3] net: allow > 0 order atomic page alloc in skb_page_frag_refill
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
2013 Dec 23
2
[PATCH net-next 2/3] virtio-net: use per-receive queue page frag alloc for mergeable bufs
...@@ static struct sk_buff *receive_mergeable(struct net_device *dev,
> int num_buf = hdr->mhdr.num_buffers;
> struct page *page = virt_to_head_page(buf);
> int offset = buf - page_address(page);
> - struct sk_buff *head_skb = page_to_skb(rq, page, offset, len,
> - MERGE_BUFFER_LEN);
> + int truesize = max_t(int, len, MERGE_BUFFER_LEN);
> + struct sk_buff *head_skb = page_to_skb(rq, page, offset, len, truesize);
> struct sk_buff *curr_skb = head_skb;
>
> if (unlikely(!curr_skb))
> @@ -353,11 +356,6 @@ static struct sk_buff *receive_mergeable(struct net...
2013 Dec 23
2
[PATCH net-next 2/3] virtio-net: use per-receive queue page frag alloc for mergeable bufs
...@@ static struct sk_buff *receive_mergeable(struct net_device *dev,
> int num_buf = hdr->mhdr.num_buffers;
> struct page *page = virt_to_head_page(buf);
> int offset = buf - page_address(page);
> - struct sk_buff *head_skb = page_to_skb(rq, page, offset, len,
> - MERGE_BUFFER_LEN);
> + int truesize = max_t(int, len, MERGE_BUFFER_LEN);
> + struct sk_buff *head_skb = page_to_skb(rq, page, offset, len, truesize);
> struct sk_buff *curr_skb = head_skb;
>
> if (unlikely(!curr_skb))
> @@ -353,11 +356,6 @@ static struct sk_buff *receive_mergeable(struct net...
2013 Nov 14
2
[PATCH] virtio-net: mergeable buffer size should include virtio-net header
...ers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -36,7 +36,10 @@ module_param(csum, bool, 0444);
module_param(gso, bool, 0444);
/* FIXME: MTU in config. */
-#define MAX_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN)
+#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
#define VIRTNET_DRIVER_VERSION "1.0.0"
@@ -314,10 +317,10 @@ static int receive_mergeable(struct receive_q...
2013 Nov 14
2
[PATCH] virtio-net: mergeable buffer size should include virtio-net header
...ers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -36,7 +36,10 @@ module_param(csum, bool, 0444);
module_param(gso, bool, 0444);
/* FIXME: MTU in config. */
-#define MAX_PACKET_LEN (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN)
+#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
#define VIRTNET_DRIVER_VERSION "1.0.0"
@@ -314,10 +317,10 @@ static int receive_mergeable(struct receive_q...
2014 Jan 16
13
[PATCH net-next v4 1/6] net: allow > 0 order atomic page alloc in skb_page_frag_refill
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
2014 Jan 16
13
[PATCH net-next v4 1/6] net: allow > 0 order atomic page alloc in skb_page_frag_refill
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
2013 Nov 27
4
[PATCH 1/2] virtio_net: fix error handling for mergeable buffers
...en)
{
- struct skb_vnet_hdr *hdr = skb_vnet_hdr(head_skb);
+ struct skb_vnet_hdr *hdr = buf;
+ int num_buf = hdr->mhdr.num_buffers;
+ struct page *page = virt_to_head_page(buf);
+ int offset = buf - page_address(page);
+ struct sk_buff *head_skb = page_to_skb(rq, page, offset, len,
+ MERGE_BUFFER_LEN);
struct sk_buff *curr_skb = head_skb;
- char *buf;
- struct page *page;
- int num_buf, len, offset;
- num_buf = hdr->mhdr.num_buffers;
+ if (unlikely(!curr_skb))
+ goto err_skb;
+
while (--num_buf) {
- int num_skb_frags = skb_shinfo(curr_skb)->nr_frags;
+ int num_skb_frags;
+
buf...
2013 Nov 27
4
[PATCH 1/2] virtio_net: fix error handling for mergeable buffers
...en)
{
- struct skb_vnet_hdr *hdr = skb_vnet_hdr(head_skb);
+ struct skb_vnet_hdr *hdr = buf;
+ int num_buf = hdr->mhdr.num_buffers;
+ struct page *page = virt_to_head_page(buf);
+ int offset = buf - page_address(page);
+ struct sk_buff *head_skb = page_to_skb(rq, page, offset, len,
+ MERGE_BUFFER_LEN);
struct sk_buff *curr_skb = head_skb;
- char *buf;
- struct page *page;
- int num_buf, len, offset;
- num_buf = hdr->mhdr.num_buffers;
+ if (unlikely(!curr_skb))
+ goto err_skb;
+
while (--num_buf) {
- int num_skb_frags = skb_shinfo(curr_skb)->nr_frags;
+ int num_skb_frags;
+
buf...
2013 Nov 28
4
[PATCH v2 1/2] virtio_net: fix error handling for mergeable buffers
...en)
{
- struct skb_vnet_hdr *hdr = skb_vnet_hdr(head_skb);
+ struct skb_vnet_hdr *hdr = buf;
+ int num_buf = hdr->mhdr.num_buffers;
+ struct page *page = virt_to_head_page(buf);
+ int offset = buf - page_address(page);
+ struct sk_buff *head_skb = page_to_skb(rq, page, offset, len,
+ MERGE_BUFFER_LEN);
struct sk_buff *curr_skb = head_skb;
- char *buf;
- struct page *page;
- int num_buf, len, offset;
- num_buf = hdr->mhdr.num_buffers;
+ if (unlikely(!curr_skb))
+ goto err_skb;
+
while (--num_buf) {
- int num_skb_frags = skb_shinfo(curr_skb)->nr_frags;
+ int num_skb_frags;
+
buf...
2013 Nov 28
4
[PATCH v2 1/2] virtio_net: fix error handling for mergeable buffers
...en)
{
- struct skb_vnet_hdr *hdr = skb_vnet_hdr(head_skb);
+ struct skb_vnet_hdr *hdr = buf;
+ int num_buf = hdr->mhdr.num_buffers;
+ struct page *page = virt_to_head_page(buf);
+ int offset = buf - page_address(page);
+ struct sk_buff *head_skb = page_to_skb(rq, page, offset, len,
+ MERGE_BUFFER_LEN);
struct sk_buff *curr_skb = head_skb;
- char *buf;
- struct page *page;
- int num_buf, len, offset;
- num_buf = hdr->mhdr.num_buffers;
+ if (unlikely(!curr_skb))
+ goto err_skb;
+
while (--num_buf) {
- int num_skb_frags = skb_shinfo(curr_skb)->nr_frags;
+ int num_skb_frags;
+
buf...
2014 Jan 17
7
[PATCH net-next v5 0/6] virtio-net: mergeable rx buffer size auto-tuning
The virtio-net device currently uses aligned MTU-sized mergeable receive
packet buffers. Network throughput for workloads with large average
packet size can be improved by posting larger receive packet buffers.
However, due to SKB truesize effects, posting large (e.g, PAGE_SIZE)
buffers reduces the throughput of workloads that do not benefit from GRO
and have no large inbound packets.
This
2014 Jan 17
7
[PATCH net-next v5 0/6] virtio-net: mergeable rx buffer size auto-tuning
The virtio-net device currently uses aligned MTU-sized mergeable receive
packet buffers. Network throughput for workloads with large average
packet size can be improved by posting larger receive packet buffers.
However, due to SKB truesize effects, posting large (e.g, PAGE_SIZE)
buffers reduces the throughput of workloads that do not benefit from GRO
and have no large inbound packets.
This
2014 Jan 17
7
[PATCH net-next v6 0/6] virtio-net: mergeable rx buffer size auto-tuning
The virtio-net device currently uses aligned MTU-sized mergeable receive
packet buffers. Network throughput for workloads with large average
packet size can be improved by posting larger receive packet buffers.
However, due to SKB truesize effects, posting large (e.g, PAGE_SIZE)
buffers reduces the throughput of workloads that do not benefit from GRO
and have no large inbound packets.
This