Re: [PATCH -v2] rmap: make anon_vma_prepare link in all the anon_vmasof a mergeable VMA

[Linus Torvalds]

On Sat, 10 Apr 2010, Linus Torvalds wrote:
> 
> I dunno. Does the above sound at all sane? Or am I just raving?
> 
> Something hacky like the above might fix it if I'm not just raving. I 
> really might be missing something here.

Btw, if this turns out to be accurate, the real fix is to probably just 
have a separate phase at the very end to actually release all the vma's, 
rather than do it in "free_page_tables()". We don't want to make the 
tlb-gather any more atomic than it already is. In fact, Nick is trying to 
make it preemptible.

So the patch included in that mail was meant very much as a "let's test my 
crazy theory" patch, rather than as the real solution.

The patch is also untested. Maybe it doesn't work at all and introduces 
new bugs. Caveat emptor.

			Linus
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