tree 58f1ab25ac9f7ca7460abbd24e9bab9c8683f6fd
parent 557922584d9c5b6b990bcfb2fec3134f0e73a05d
author Patrick McHardy <kaber@trash.net> 1176144438 -0700
committer David S. Miller <davem@sunset.davemloft.net> 1177565318 -0700

[XFRM]: Optimize MTU calculation

Replace the probing based MTU estimation, which usually takes 2-3 iterations
to find a fitting value and may underestimate the MTU, by an exact calculation.

Also fix underestimation of the XFRM trailer_len, which causes unnecessary
reallocations.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>