Trying to cause a writepage from commit_write?

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Hi there,

I'm writing a custom filesystem that does not use a block device as it's 
backing store.  I think it should be possible to arrange for a writepage to 
be called at some point after a commit_write - for instance by just dirtying 
the page and waiting for it to be flushed.

I've tried various methods for dirtying the page, but my writepage() method 
never seems to get called.  I can't see anything obvious that I'm missing, 
but most other filesystems end up calling into the block layer at some point, 
so they don't correspond very well to what I'm trying to do.

Any suggestions or pointers would be greatly appreciated.

Cheers,
Mark

-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!
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