lists.openwall.net   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  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Fri, 21 Dec 2012 10:34:39 -0800
From:	Eric Dumazet <erdnetdev@...il.com>
To:	Rick Jones <rick.jones2@...com>
Cc:	David Miller <davem@...emloft.net>, netdev <netdev@...r.kernel.org>
Subject: Re: [RFC] IP_MAX_MTU value

On Fri, 2012-12-21 at 10:19 -0800, Rick Jones wrote:

> If you go beyond the protocol limit of an IPv4 datagram, won't it be 
> necessary to  start being a bit more conditional on IPv4 vs IPv6?
> 

This IP_MAX_MTU is really an IPv4 thing (static to net/ipv4/route.c)


> 
> 99 times out of 10 I will assert that faster is better, but do we need 
> another 50% for UDP over loopback with that large a message size?

Well, I only didnt understand why sending 65507 UDP messages had to use
fragments. I didnt care of performance at this point, only tried to have
an reasonable explanation.

It turns out its a strange limitation.




--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists