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  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Fri, 17 Oct 2014 07:12:46 -0700
From:	Alexander Duyck <>
To:	Eric Dumazet <>,
	"" <>
CC:	Alexander Duyck <>,
	David Miller <>,
	"" <>,
	"" <>,
	"" <>,
	"" <>
Subject: Re: [PATCH] net: use hardware buffer pool to allocate skb

On 10/17/2014 07:05 AM, Eric Dumazet wrote:
> On Fri, 2014-10-17 at 02:35 +0000, wrote:
>> [Pan Jiafei] Hi, Alex, thanks for your comments. I don’t confirm that
>> you have catch my concerns. For example, I want to add igb net card 
>> into my bridge, and want to igb net driver allocate skb by using
>> my specified memory address, but I don’t want to modify igb net driver
>> directly, how to do this in my bridge drivers?
> This is exactly our point : We do not want to modify all drivers so that
> your bridge is happy with them.
> You'll have to make your bridge using standard infra instead.
> IGB has no way to know in advance that a particular frame should
> eventually reach your bridge anyway.

Also why is it igb should use your buffers, is there any reason why your
device cannot use the receive buffers that are handed off to the stack
from igb?  It isn't as if there is a copy in the routing or bridging
path.  The receive buffer is normally handed off to the stack from the
ingress device, a few headers might get tweaked, and then that buffer is
transmitted by the egress interface.  Only in the case of a buffer being
handed to multiple egress devices or user space should it ever be copied.


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