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(parent: 4a9a296) | patch
tcp: Optimise len/mss comparison
authorHerbert Xu <herbert@gondor.apana.org.au>
Tue, 26 May 2009 18:50:26 +0000 (18:50 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 27 May 2009 10:26:00 +0000 (03:26 -0700)
commit30a3ae30c775e2723f86ef70746ad3cb4404a4c9
tree9a3365e4a2b611930f31674a0162126625adac10tree | snapshot
parent4a9a2968a17eae42ef5dffca8b37534c864e30cccommit | diff
tcp: Optimise len/mss comparison

Instead of checking len > mss || len == 0, we can accomplish
both by checking (len - 1) > mss using the unsigned wraparound.
At nearly a million times a second, this might just help.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp.c diff | blob | history
Full containers within linux kernel