Re: [3/3] use vmalloc() to arrange guard pages for stacks

[Chuck Ebbert]

Bill Irwin wrote:
> 
> It's a shame that the resource scalability implications of vmallocspace
> allocations prevent this from being useful in production. One could, in
> principle, establish guard pages within ZONE_NORMAL, but for 4KB stacks
> it's somewhat awkward to dredge up 3 contigous pages, and 4 defeats the
> purpose. Alignment with 8KB stacks wants 2 contiguous order 1 pages that
> span an order 2 page boundary. I guess I could rewrite the page allocator
> (again), but people seem to feel safest with the buddy allocator affairs.
> 
> BTW, did the original patches for this prove to be of any use to you?
> 

No, I never tried them. Seems like I never get to anything these days but
answering bug reports and merging fixes... Putting the feature in-kernel
means I might get to use it though. :)
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