On Thu, Jan 06, 2011 at 11:40:13AM -0600, James Bottomley wrote:

On Wed, 2011-01-05 at 23:28 +0000, James Bottomley wrote:

quoted

Can you explain how the code works? it looks to me like you read the xdr
stuff through the vmap region then write it out directly to the pages? 

OK, I think I see how this is supposed to work:  It's a sequential loop
of reading in via the pages (i.e. through the kernel mapping) and then
updating those pages via the vmap.  In which case, I think this patch is
what you need.

The theory of operation is that the readdir on pages actually uses the
network DMA operations to perform, so when it's finished, the underlying

What network DMA operations - what if your NIC doesn't do DMA because
it's an SMSC device?