linux-kernel - Re: [patch v1, kernel version 3.2.1] rtnetlink workaround around the skb buff size issue

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Message-ID: <CAGsizzKVMHT2TUK2O0odbpm6tkMHq9isSOZcjEies+fOOkURYA@mail.gmail.com>
Date:	Mon, 6 Feb 2012 19:32:16 +0100
From:	Štefan Gula <steweg@...t.sk>
To:	"Rose, Gregory V" <gregory.v.rose@...el.com>
Cc:	David Miller <davem@...emloft.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [patch v1, kernel version 3.2.1] rtnetlink workaround around the
 skb buff size issue

2012/2/6 Rose, Gregory V <gregory.v.rose@...el.com>:
> That is exactly my approach.  We currently have a *bug* in the kernel that this patch is addressing.  The kernel is attempting to provide too much information for the netlink interface to handle and it's breaking things.  So what I want to do is fix the immediate problem while still providing a way for folks to get the information they need.  I've accomplished this by doing exactly what Dave asked me to do, provide a filter that defaults to off and then provide a way for the user to request discrete chunks of information in the dump that won't exceed the netlink buffer limits.
>
> The patch is fairly unobtrusive and simple to understand.
>
> I appreciate that it doesn't do all that you'd like to see done and I see no reason why you couldn't go on and develop the extended features that you would like to see, correct?  There's nothing in my patch that would prevent that so far as I can tell, although I'm not that familiar with your requirements or proposals yet.
Greg, your patch is completely ok for filtering. I like that thing. I
am just stating that it doesn't eliminate every possible option that
can happen so I believe we should also have method for using cycles -
that's what my patch is doing. So I believe both approaches should be
applied.
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