Subject: Re: [PATCH] NUMA aware allocation of transmit and receive buffers for e1000

From: Ganesh Venkatesan <[email-masked]>
Date: Wed, 18 May 2005 08:55:39 -0700

On 5/17/05, Andrew Morton <[email-masked]> wrote:
> I think the e1000 driver is being a bit insane there.  I figure that
Do you mean insane to use vmalloc?

> sizeof(struct e1000_buffer) is 28 on 64-bit, so even with 4k pagesize we'll
> always succeed in being able to support a 32k/32 = 1024-entry Tx ring.
> 
> Is there any real-world reason for wanting larger ring sizes than that?
> 
> 
We have had cases where allocation of 32K of memory (via kmalloc) fails. 

ganesh.