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Re: netlink drops messages.

To: Gleb Natapov <gleb@xxxxxxxxxxx>
Subject: Re: netlink drops messages.
From: Andi Kleen <ak@xxxxxx>
Date: Wed, 17 Jan 2001 17:14:38 +0100
Cc: Andi Kleen <ak@xxxxxx>, kuznet@xxxxxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20010117155035.C16180@nbase.co.il>; from gleb@nbase.co.il on Wed, Jan 17, 2001 at 02:51:48PM +0100
References: <20010116200600.C5122@nbase.co.il> <200101161828.VAA31502@ms2.inr.ac.ru> <20010117101720.F5122@nbase.co.il> <20010117120652.A1830@fred.local> <20010117133932.B16180@nbase.co.il> <20010117141900.A3308@fred.local> <20010117155035.C16180@nbase.co.il>
Sender: owner-netdev@xxxxxxxxxxx
On Wed, Jan 17, 2001 at 02:51:48PM +0100, Gleb Natapov wrote:
> 
> You are trying to say that if I'll connect to my router via 9600 serial line 
> and run 'ip monitor'
> there the routing daemon will not be able to feed routes to the kernel 
> quicker than ip monitor will
> be able to read them and send output via slow serial line?! Somehow 9600 
> serial line become a
> bottleneck! Are you sure about that, or I misunderstood you?

You misunderstood me. The kernel side doesn't do any flow control, it just 
drops messages when the 
buffers fill up. The user side does flow control by blocking or EAGAIN, e.g. 
you submitting new
routes.


-Andi

-- 
This is like TV. I don't like TV.

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