Re: [PATCH 3/8] Allow huge page allocations to use GFP_HIGH_MOVABLE

[Mel Gorman <mel@csn.ul.ie>]

On Fri, 26 Jan 2007, Christoph Lameter wrote:

> On Fri, 26 Jan 2007, Mel Gorman wrote:
>
> > > What is the e1000 problem? Jumbo packet allocation via GFP_KERNEL?
> > Yes. Potentially the anti-fragmentation patches could address this by
> > clustering atomic allocations together as much as possible.
>
> GFP_ATOMIC allocs?

Yes

> Do you have a reference to the thread where this was
> discussed?

It's come up a few times and the converation is always fairly similar 
although the thread http://lkml.org/lkml/2006/9/22/44 has interesting 
information on the topic. There has been no serious discussion on whether 
anti-fragmentation would help it or not. I think it would if atomic 
allocations were clustered together because then jumbo frame allocations 
would cluster together in the same MAX_ORDER blocks and tend to keep other 
allocations away.


--
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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