netdev - Re: [PATCH] [next-next-2.6] net: configurable device name hash

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Date:	Thu, 12 Nov 2009 23:16:20 +1030
From:	Mark Smith <lk-netdev@...netdev.nosense.org>
To:	David Miller <davem@...emloft.net>
Cc:	opurdila@...acom.com, shemminger@...tta.com, netdev@...r.kernel.org
Subject: Re: [PATCH] [next-next-2.6] net: configurable device name hash

On Wed, 11 Nov 2009 18:36:26 -0800 (PST)
David Miller <davem@...emloft.net> wrote:

> From: Octavian Purdila <opurdila@...acom.com>
> Date: Wed, 11 Nov 2009 23:47:41 +0200
> 
> > We could use a similar function that will work in the per namespace
> > initialization context, but this might upset net namespace folks
> > since we will get a large hash for every namespace.
> 
> Use kzalloc(), that's sufficient for a 64K or so hash table which is
> way more than you ever will need.
> 
> Use the GFP_* flags that will silently (ie. without a log message)
> fail, and divide by two until you successfully allocate the table if
> you're worried about memory fragmentation at allocation time.
> 
> This is so straightforward, I can't believe we're talking so much
> about how to implement this, it's a 15 minute hack :-)

Yes, but sadly, sometimes there is too much history(!) to be able to be
fully aware of it. "suck-it-and-see" type patches are possibly a
quicker way to find out what people are thinking right now!

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