Re: ftruncate-mmap: pages are lost after writing to mmaped file.

[Linus Torvalds]

On Thu, 19 Mar 2009, Linus Torvalds wrote:
> 
> Ahh, so you re-created it? On ext2 only, or is it visible on ext3 as well? 
> I've not even tested - I assumed that I would have to boot into less 
> memory and downgrade my filesystem to ext2, which made me hope somebody 
> else would pick it up first ;)

Oh, btw, can people who see this (Ying Han, Nick and apparently Jan) 
detail their configurations, please? In particular

 - SMP? (CONFIG_SMP and how many cores do you have if so?)

 - PREEMPT (NONE/VOLUNTARY or full preempt?)

 - RCU (CLASSIC/TREE/PREEMPT?)

since those affect the kinds of races we can see a lot.

			Linus
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