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Date: Fri, 23 May 2014 15:30:37 +0000 From: David Laight <David.Laight@...LAB.COM> To: 'Eric Dumazet' <eric.dumazet@...il.com>, Jim Baxter <jim_baxter@...tor.com> CC: 'Bjørn Mork' <bjorn@...k.no>, "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "David S. Miller" <davem@...emloft.net>, "kamal@...onical.com" <kamal@...onical.com>, "edumazet@...gle.com" <edumazet@...gle.com>, "mszeredi@...e.cz" <mszeredi@...e.cz>, "fw@...len.de" <fw@...len.de> Subject: RE: skbuff truesize incorrect. From: Eric Dumazet ... > TCP stack uses fast clones, and current stack gives them a truesize of > 2048 + sizeof(sk_buff), while it really should be 2048 + > 2*sizeof(sk_buff) > > Luckily, GSO/TSO tends to reduce the error, as skbs overhead is lower. Doesn't that affect the tx side - where the truesize doesn't matter as much? David
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