netdev - Re: UDP path MTU discovery

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Message-ID: <20100331235149.GE3042@nuttenaction>
Date:	Thu, 1 Apr 2010 01:51:49 +0200
From:	Hagen Paul Pfeifer <hagen@...u.net>
To:	Glen Turner <gdt@....id.au>
Cc:	David Miller <davem@...emloft.net>, rick.jones2@...com,
	netdev@...r.kernel.org
Subject: Re: UDP path MTU discovery

* Glen Turner | 2010-04-01 10:12:03 [+1030]:

>Does select() return from its blocking so the application can make
>use of this indication immediately, rather than after the
>application's exponentially-increasing wait?

Yes, poll() will return immediately with POLLERR.

>Is an incoming ICMP the only cause of EMSGSIZE?  That is, can an
>application safely retransmit immediately?

IIRC, yes.


Cheers, Hagen

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