From: Patrick McHardy <kaber@trash.net>
Date: Mon, 9 Apr 2007 18:47:18 +0000 (-0700)
Subject: [XFRM]: Optimize MTU calculation
X-Git-Tag: v2.6.22-rc1~1128^2~135
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c5c2523893747f88a83376abad310c8ad13f7197;p=pandora-kernel.git

[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>
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