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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Browse source 
Conflicts:
	drivers/net/xen-netback/netback.c
	net/core/filter.c

A filter bug fix overlapped some cleanups and a conversion
over to some new insn generation macros.

A xen-netback bug fix overlapped the addition of multi-queue
support.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2014-06-05 16:22:02 -07:00
commit f666f87b94
7 changed files with 48 additions and 23 deletions
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36
drivers/net/xen-netback/netback.c
View file

@ -168,7 +168,8 @@ bool xenvif_rx_ring_slots_available(struct xenvif_queue *queue, int needed)
* adding 'size' bytes to a buffer which currently contains 'offset'
* bytes.
*/
static bool start_new_rx_buffer(int offset, unsigned long size, int head)
static bool start_new_rx_buffer(int offset, unsigned long size, int head,
bool full_coalesce)
{
/* simple case: we have completely filled the current buffer. */
if (offset == MAX_BUFFER_OFFSET)
@ -180,6 +181,7 @@ static bool start_new_rx_buffer(int offset, unsigned long size, int head)
* (i) this frag would fit completely in the next buffer
* and (ii) there is already some data in the current buffer
* and (iii) this is not the head buffer.
* and (iv) there is no need to fully utilize the buffers
*
* Where:
* - (i) stops us splitting a frag into two copies
@ -190,6 +192,8 @@ static bool start_new_rx_buffer(int offset, unsigned long size, int head)
* by (ii) but is explicitly checked because
* netfront relies on the first buffer being
* non-empty and can crash otherwise.
* - (iv) is needed for skbs which can use up more than MAX_SKB_FRAGS
* slot
*
* This means we will effectively linearise small
* frags but do not needlessly split large buffers
@ -197,7 +201,8 @@ static bool start_new_rx_buffer(int offset, unsigned long size, int head)
* own buffers as before.
*/
BUG_ON(size > MAX_BUFFER_OFFSET);
if ((offset + size > MAX_BUFFER_OFFSET) && offset && !head)
if ((offset + size > MAX_BUFFER_OFFSET) && offset && !head &&
!full_coalesce)
return true;
return false;
@ -232,6 +237,13 @@ static struct xenvif_rx_meta *get_next_rx_buffer(struct xenvif_queue *queue,
return meta;
}
struct xenvif_rx_cb {
int meta_slots_used;
bool full_coalesce;
};
#define XENVIF_RX_CB(skb) ((struct xenvif_rx_cb *)(skb)->cb)
/*
* Set up the grant operations for this fragment. If it's a flipping
* interface, we also set up the unmap request from here.
@ -266,7 +278,10 @@ static void xenvif_gop_frag_copy(struct xenvif_queue *queue, struct sk_buff *skb
if (bytes > size)
bytes = size;
if (start_new_rx_buffer(npo->copy_off, bytes, *head)) {
if (start_new_rx_buffer(npo->copy_off,
bytes,
*head,
XENVIF_RX_CB(skb)->full_coalesce)) {
/*
* Netfront requires there to be some data in the head
* buffer.
@ -548,12 +563,6 @@ static void xenvif_add_frag_responses(struct xenvif_queue *queue, int status,
}
}
struct xenvif_rx_cb {
int meta_slots_used;
};
#define XENVIF_RX_CB(skb) ((struct xenvif_rx_cb *)(skb)->cb)
void xenvif_kick_thread(struct xenvif_queue *queue)
{
wake_up(&queue->wq);
@ -609,10 +618,15 @@ static void xenvif_rx_action(struct xenvif_queue *queue)
/* To avoid the estimate becoming too pessimal for some
* frontends that limit posted rx requests, cap the estimate
* at MAX_SKB_FRAGS.
* at MAX_SKB_FRAGS. In this case netback will fully coalesce
* the skb into the provided slots.
*/
if (max_slots_needed > MAX_SKB_FRAGS)
if (max_slots_needed > MAX_SKB_FRAGS) {
max_slots_needed = MAX_SKB_FRAGS;
XENVIF_RX_CB(skb)->full_coalesce = true;
} else {
XENVIF_RX_CB(skb)->full_coalesce = false;
}
/* We may need one more slot for GSO metadata */
if (skb_is_gso(skb) &&