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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>
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@ -74,22 +74,12 @@ struct netfront_info {
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struct napi_struct napi;
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struct xen_netif_tx_front_ring tx;
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struct xen_netif_rx_front_ring rx;
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unsigned int evtchn;
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struct xenbus_device *xbdev;
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spinlock_t tx_lock;
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spinlock_t rx_lock;
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unsigned int evtchn;
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/* Receive-ring batched refills. */
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#define RX_MIN_TARGET 8
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#define RX_DFL_MIN_TARGET 64
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#define RX_MAX_TARGET min_t(int, NET_RX_RING_SIZE, 256)
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unsigned rx_min_target, rx_max_target, rx_target;
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struct sk_buff_head rx_batch;
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struct timer_list rx_refill_timer;
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struct xen_netif_tx_front_ring tx;
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int tx_ring_ref;
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/*
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* {tx,rx}_skbs store outstanding skbuffs. Free tx_skb entries
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@ -108,14 +98,23 @@ struct netfront_info {
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grant_ref_t grant_tx_ref[NET_TX_RING_SIZE];
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unsigned tx_skb_freelist;
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spinlock_t rx_lock ____cacheline_aligned_in_smp;
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struct xen_netif_rx_front_ring rx;
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int rx_ring_ref;
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/* Receive-ring batched refills. */
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#define RX_MIN_TARGET 8
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#define RX_DFL_MIN_TARGET 64
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#define RX_MAX_TARGET min_t(int, NET_RX_RING_SIZE, 256)
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unsigned rx_min_target, rx_max_target, rx_target;
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struct sk_buff_head rx_batch;
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struct timer_list rx_refill_timer;
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struct sk_buff *rx_skbs[NET_RX_RING_SIZE];
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grant_ref_t gref_rx_head;
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grant_ref_t grant_rx_ref[NET_RX_RING_SIZE];
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struct xenbus_device *xbdev;
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int tx_ring_ref;
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int rx_ring_ref;
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unsigned long rx_pfn_array[NET_RX_RING_SIZE];
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struct multicall_entry rx_mcl[NET_RX_RING_SIZE+1];
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struct mmu_update rx_mmu[NET_RX_RING_SIZE];
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