Re: [PATCH 1/8] THP: Use real address for NUMA policy

[Alex Thorlton]

> Could you add some actual descriptions to these patches that say why you
> are doing this, and why this particular patch is needed and implemented
> this way?
> 
> You mention that THP is slow for you, then go on to implement some
> non-cached page zero'ing, but you never quite connect the dots.

I actually didn't write these patches (made a few tweaks to get them
running on the latest kernel though).  They were submitted last July by 
Peter Zijlstra.  Andi Kleen suggested that I re-run some of my tests
using these patches to see whether they solved my issue.  I just
included my updated patches so that people could confirm that I'd pulled
them forward properly.

The messages from the original submission can be found here:
https://lkml.org/lkml/2012/7/20/165

I did write the patch that these were submitted in response to, to
control THP on a per-process basis, but it looks like we're probably
going to end up taking this in a different direction, pending some more
test results.

- Alex
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