[Fwd: [RFC][PATCH] flush_hash_page]

[Joel Schopp]

> First of all, if you do that, doesn't it assume that all ptes that are
> passed in are large pages?  I don't think that's correct.  
> 
> Also, think about how huge pages are implemented in Linux.  Do huge
> pages really even get Linux ptes, or just pmds that act like ptes?  

It appears that large pages only have pmds (as evidenced by hugepte_t 
being an int and not a long among other things).  It turns out there 
already is a flush_hash_hugepage that does what I am trying to do. 
Figuring out which to call isn't too bad either. 
if(in_hugepage_area(context, ea)) should do the trick.

Might be nice to clean up flush_hash_page to totally remove the large 
variable and associated code, and add a comment about flush_hash_hugepage.

Thanks for your patience while I learn this stuff.