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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2007-10-15 12:59:53 -0700 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-15 16:13:36 -0400 |
| commit | 84284d3c1d6372bc9ab496607661d230d9c45de4 (patch) | |
| tree | 3226b21ccb77955380ebfb1201c5714c88f1dc38 /drivers/net | |
| parent | e9edda697ed7697f1288d0656570e49c47e204ae (diff) | |
| download | linux-stable-84284d3c1d6372bc9ab496607661d230d9c45de4.tar.gz linux-stable-84284d3c1d6372bc9ab496607661d230d9c45de4.tar.bz2 linux-stable-84284d3c1d6372bc9ab496607661d230d9c45de4.zip | |
xen-netfront: rearrange netfront structure to separate tx and rx
Keep tx and rx elements separate on different cachelines to prevent
bouncing.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/xen-netfront.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index f464b82c7d5f..7fd505cc4f7a 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -74,22 +74,12 @@ struct netfront_info { struct napi_struct napi; - struct xen_netif_tx_front_ring tx; - struct xen_netif_rx_front_ring rx; - - spinlock_t tx_lock; - spinlock_t rx_lock; - unsigned int evtchn; + struct xenbus_device *xbdev; - /* Receive-ring batched refills. */ -#define RX_MIN_TARGET 8 -#define RX_DFL_MIN_TARGET 64 -#define RX_MAX_TARGET min_t(int, NET_RX_RING_SIZE, 256) - unsigned rx_min_target, rx_max_target, rx_target; - struct sk_buff_head rx_batch; - - struct timer_list rx_refill_timer; + spinlock_t tx_lock; + struct xen_netif_tx_front_ring tx; + int tx_ring_ref; /* * {tx,rx}_skbs store outstanding skbuffs. Free tx_skb entries @@ -108,14 +98,23 @@ struct netfront_info { grant_ref_t grant_tx_ref[NET_TX_RING_SIZE]; unsigned tx_skb_freelist; + spinlock_t rx_lock ____cacheline_aligned_in_smp; + struct xen_netif_rx_front_ring rx; + int rx_ring_ref; + + /* Receive-ring batched refills. */ +#define RX_MIN_TARGET 8 +#define RX_DFL_MIN_TARGET 64 +#define RX_MAX_TARGET min_t(int, NET_RX_RING_SIZE, 256) + unsigned rx_min_target, rx_max_target, rx_target; + struct sk_buff_head rx_batch; + + struct timer_list rx_refill_timer; + struct sk_buff *rx_skbs[NET_RX_RING_SIZE]; grant_ref_t gref_rx_head; grant_ref_t grant_rx_ref[NET_RX_RING_SIZE]; - struct xenbus_device *xbdev; - int tx_ring_ref; - int rx_ring_ref; - unsigned long rx_pfn_array[NET_RX_RING_SIZE]; struct multicall_entry rx_mcl[NET_RX_RING_SIZE+1]; struct mmu_update rx_mmu[NET_RX_RING_SIZE]; |