diff options
| author |   Nick Nunley <nicholasx.d.nunley@intel.com> | 2010-02-17 01:04:37 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-02-17 13:21:37 -0800 |
| commit | 40e90c26f573fa5082be6e046b346e19ab0cd25f (patch) | |
| tree | 5c1676d99568fa07ad144a70c57a413ab5de2d5a | |
| parent | igb: inline igb_maybe_stop_tx (diff) | |
| download | linux-dev-40e90c26f573fa5082be6e046b346e19ab0cd25f.tar.xz linux-dev-40e90c26f573fa5082be6e046b346e19ab0cd25f.zip | |
igb: move gso_segs into buffer_info structure
This change moves gso_segs into the buffer_info structure to avoid
a possible cache line miss in clean_tx_irq.
Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/igb/igb.h | 1 | ||||
| -rw-r--r-- | drivers/net/igb/igb_main.c | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h index 8f07bc0a1d4c..7854b66648c7 100644 --- a/drivers/net/igb/igb.h +++ b/drivers/net/igb/igb.h @@ -141,6 +141,7 @@ struct igb_buffer { u16 length; u16 next_to_watch; u16 mapped_as_page; + u16 gso_segs; }; /* RX */ struct { diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index a1fe581febc0..91c123f9df92 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -3641,6 +3641,7 @@ static inline int igb_tx_map_adv(struct igb_ring *tx_ring, struct sk_buff *skb, } tx_ring->buffer_info[i].skb = skb; + tx_ring->buffer_info[i].gso_segs = skb_shinfo(skb)->gso_segs ?: 1; tx_ring->buffer_info[first].next_to_watch = i; return ++count; @@ -5032,7 +5033,7 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector) if (skb) { unsigned int segs, bytecount; /* gso_segs is currently only valid for tcp */ - segs = skb_shinfo(skb)->gso_segs ?: 1; + segs = buffer_info->gso_segs; /* multiply data chunks by size of headers */ bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; |