K 10
svn:author
V 8
jhibbits
K 8
svn:date
V 27
2017-11-20T04:32:01.035253Z
K 7
svn:log
V 429
Eliminate 1 XX_VirtToPhys() and 2 XX_PhysToVirt() calls from if_dtsec(4)

XX_VirtToPhys(), by way of pmap_kextract(), is an expensive operation.
Profiling via dtrace during a series of iperf tests I found 16111 / 30432
stack frames were located in mmu_booke_kextract(), so eliminating this
expensive call should improve performance slightly.  XX_PhysToVirt() is not
as expensive, but redundant calls in this context is wasteful.

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