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

["David S. Miller" <davem@xxxxxxxxxxxxx>]

From: Christoph Lameter <christoph@xxxxxxxxxxx>
Subject: Re: [PATCH] NUMA aware allocation of transmit and receive buffers for 
e1000
Date: Tue, 17 May 2005 19:52:38 -0700 (PDT)

> > > - txdr->buffer_info = vmalloc(size);
> > > + txdr->buffer_info = kmalloc_node(size, GFP_KERNEL, node);
> > 
> > How come that this is safe to do
> 
> Because physically contiguous memory is usually better than virtually 
> contiguous memory? Any reason that physically contiguous memory will 
> break the driver?

The issue is whether size can end up being too large for
kmalloc() to satisfy, whereas vmalloc() would be able to
handle it.