netdev - RE: [E1000-devel] [e100] Page allocation failure warning(?) in 2.6.36.3

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Date:	Thu, 13 Jan 2011 01:00:35 -0800 (PST)
From:	Chris Rankin <rankincj@...oo.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	JesseBrandeburg <jesse.brandeburg@...el.com>,
	David Miller <davem@...emloft.net>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>,
	Tushar NDave <tushar.n.dave@...el.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Jeffrey TKirsher <jeffrey.t.kirsher@...el.com>
Subject: RE: [E1000-devel] [e100] Page allocation failure warning(?) in 2.6.36.3

--- On Thu, 13/1/11, Eric Dumazet <eric.dumazet@...il.com> wrote:
> Problem is e100 allocates an order-6 page in DMA zone
> (a 256 KB contigous area of ram)
> 
> This contigous area of ram is not available but just after
> booting...

I suspected as much. Fortunately, this machine has no function apart from routing and can happily left untouched for extended periods of time.

> On such small router, I doubt you need more than 64 slots
> in TX ring buffer.

But what would the effect of that change be to the interfaces' performance, please?

Cheers,
Chris


      
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