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SubjectRe: ftruncate-mmap: pages are lost after writing to mmaped file.
On Thu 19-03-09 13:21:28, Linus Torvalds wrote:
>
>
> 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
I'm able to see it only under UML. I've tried to reproduce under normal
machine but without luck. My system is single CPU Athlon64.

> - SMP? (CONFIG_SMP and how many cores do you have if so?)
>
> - PREEMPT (NONE/VOLUNTARY or full preempt?)
Above two don't exist in UML, but I assume UML behaves basically like full
preempt SMP...

> - RCU (CLASSIC/TREE/PREEMPT?)
RCU is CLASSIC.

Honza
--
Jan Kara <jack@suse.cz>
SUSE Labs, CR


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