Hi!

Am Fri, 25 Jan 2013 14:27:21 -0800
schrieb Tristan Schmelcher <tschmelc...@google.com>:

> Hello again, Richard. Wondering if you have a rough patch that you'd
> like me to try out. If not, I'd be happy to work on the fix if you
> could give me some pointers to where the issue is in the hostfs code.

Not really.
I think it's time to involve some vfs guys.
What I know so far: Writeback of mmap()'ed pages does not happen.
Calling msync() by hand causes the writeback.
The pages get correctly marked as dirty, the bdi code is also sane.

Thanks,
//richard

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