lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:	Sun, 28 Sep 2014 16:36:11 -0400 (EDT)
From:	David Miller <>
Subject: Re: [PATCH v4 net-next 0/3] tcp: better TCP_SKB_CB layout

From: Eric Dumazet <>
Date: Sat, 27 Sep 2014 09:50:54 -0700

> TCP had the assumption that IPCB and IP6CB are first members of skb->cb[]
> This is fine, except that IPCB/IP6CB are used in TCP for a very short time
> in input path.
> What really matters for TCP stack is to get skb->next,
> TCP_SKB_CB(skb)->seq, and TCP_SKB_CB(skb)->end_seq in the same cache line.
> skb that are immediately consumed do not care because whole skb->cb[] is
> hot in cpu cache, while skb that sit in wocket write queue or receive queues
> do not need TCP_SKB_CB(skb)->header at all.
> This patch set implements the prereq for IPv4, IPv6, and TCP to make this
> possible. This makes TCP more efficient.

Series applied, thanks.
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists