netdev - Re: [PATCH net/for-next V1 1/1] IB/ipoib: break linkage to neighbouring system

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Date:	Tue, 24 Jul 2012 09:23:25 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Or Gerlitz <ogerlitz@...lanox.com>
cc:	Shlomo Pongartz <shlomop@...lanox.com>, roland@...nel.org,
	davem@...emloft.net, linux-rdma@...r.kernel.org,
	erezsh@...lanox.com,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net/for-next V1 1/1] IB/ipoib: break linkage to neighbouring
 system

On Thu, 19 Jul 2012, Or Gerlitz wrote:

> > If you have neighbor expiration periods of 4 hrs and it is necessary to
> > run the expiration logic then please expire all the neighbor entries due a
> > certain period after that as well to avoid running the expiration again in
> > the next minute or so.
>
>
> This is still a bit unclear here... do you mean to say that at a certain point
> in time,
> **all** entries need to be deleted irrelevant of their (jiffies) age? why?

No. Just the ones in a certain time frame.
>
> > I guess the fuzz factor needs to scale depending on the expiration period.
> >
> >
>
> and this is what happens now, the factor is 0.5, entry would be deleted when
> if  (60m <= unused < 90s) holds

Ok that sounds good and that is what I meant.

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