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Date:	Mon, 22 Sep 2008 09:56:28 +1000
From:	Simon Horman <>
To:	Sven Wegener <>
	Julian Anastasov <>,
	Wensong Zhang <>
Subject: Re: [PATCH] ipvs: Restrict sync message to 255 connections

On Fri, Sep 19, 2008 at 08:41:56PM +0200, Sven Wegener wrote:
> The nr_conns variable in the sync message header is only eight bits wide
> and will overflow on interfaces with a large MTU. As a result the backup
> won't parse all connections contained in the sync buffer. On regular
> ethernet with an MTU of 1500 this isn't a problem, because we can't
> overflow the value, but consider jumbo frames being used on a cross-over
> connection between both directors.
> We now restrict the size of the sync buffer, so that we never put more
> than 255 connections into a single sync buffer.
> Signed-off-by: Sven Wegener <>

Thanks Sven, applied.

Simon Horman
  VA Linux Systems Japan K.K., Sydney, Australia Satellite Office
  H:             W:

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