From: David S. Miller <davem@davemloft.net>
Date: Fri, 5 Aug 2005 02:52:01 +0000 (-0700)
Subject: [PATCH] tcp: fix TSO sizing bugs
X-Git-Tag: v2.6.13-rc6~38
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=846998ae87a80b0fd45b4cf5cf001a159d746f27;p=pandora-kernel.git

[PATCH] tcp: fix TSO sizing bugs

MSS changes can be lost since we preemptively initialize the tso_segs count
for an SKB before we %100 commit to sending it out.

So, by the time we send it out, the tso_size information can be stale due
to PMTU events.  This mucks up all of the logic in our send engine, and can
even result in the BUG() triggering in tcp_tso_should_defer().

Another problem we have is that we're storing the tp->mss_cache, not the
SACK block normalized MSS, as the tso_size.  That's wrong too.

Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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