Re: [PATCHSET] block: fix PIO cache coherency bug, take 2

[Miklos Szeredi]

> > > I tried to implement flush_anon_page() too but didn't know what to
> > do
> > > with anon_vma object.
> > 
> > I'm not sure what this is about...
> 
> This was for fuse on parisc.

I have reports that this effects some ARM architectures as well.

And direct I/O over NFS and a couple other things which also use the
get_user_pages() mechanism will also not work properly without
flush_anon_page().

Miklos
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