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


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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