Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 30a3ae30 authored by Herbert Xu's avatar Herbert Xu Committed by David S. Miller
Browse files

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: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4a9a2968

net/ipv4/tcp.c

+1 −1
Original line number Diff line number Diff line
@@ -2566,7 +2566,7 @@ found: 


	mss = skb_shinfo(p)->gso_size;



	flush |= (len > mss) | !len;

	flush |= (len - 1) >= mss;

	flush |= (ntohl(th2->seq) + skb_gro_len(p)) ^ ntohl(th->seq);



	if (flush || skb_gro_receive(head, skb)) {