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Index: sys/dev/ixgbe/ixgbe.h
===================================================================
--- sys/dev/ixgbe/ixgbe.h
+++ sys/dev/ixgbe/ixgbe.h
@@ -162,8 +162,9 @@
* modern Intel CPUs, results in 40 bytes wasted and a significant drop
* in observed efficiency of the optimization, 97.9% -> 81.8%.
*/
-#define IXGBE_RX_COPY_LEN 160
-#define IXGBE_RX_COPY_ALIGN (MHLEN - IXGBE_RX_COPY_LEN)
+#define IXGBE_RX_COPY_HDR_PADDED ((((MPKTHSIZE - 1) / 32) + 1) * 32)
+#define IXGBE_RX_COPY_LEN (MSIZE - IXGBE_RX_COPY_HDR_PADDED)
+#define IXGBE_RX_COPY_ALIGN (IXGBE_RX_COPY_HDR_PADDED - MPKTHSIZE)
/* Keep older OS drivers building... */
#if !defined(SYSCTL_ADD_UQUAD)

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