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bnx2x: Prefetch the page containing the BD descriptor

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Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eilon Greenstein 2009-08-12 08:23:20 +00:00 • committed by David S. Miller
parent 6fe49bb978
commit 619e7a66b5
1 changed files with 7 additions and 0 deletions
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7
drivers/net/bnx2x_main.c
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@ -1498,6 +1498,13 @@ static int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
bd_prod = RX_BD(bd_prod); bd_prod = RX_BD(bd_prod);
bd_cons = RX_BD(bd_cons); bd_cons = RX_BD(bd_cons);
/* Prefetch the page containing the BD descriptor
at producer's index. It will be needed when new skb is
allocated */
prefetch((void *)(PAGE_ALIGN((unsigned long)
(&fp->rx_desc_ring[bd_prod])) -
PAGE_SIZE + 1));
cqe = &fp->rx_comp_ring[comp_ring_cons]; cqe = &fp->rx_comp_ring[comp_ring_cons];
cqe_fp_flags = cqe->fast_path_cqe.type_error_flags; cqe_fp_flags = cqe->fast_path_cqe.type_error_flags;