Re: [RFC PATCH] afs: Stop implementing ->writepage()

[David Howells <dhowells@redhat.com>]

Christoph Hellwig <hch@lst.de> wrote:

> >  (1) afs_write_back_from_locked_folio() could be called directly rather
> >      than calling filemap_fdatawrite_wbc(), but that would avoid the
> >      control group stuff that wbc_attach_and_unlock_inode() and co. seem to
> >      do.  Do I actually need to do this?
> 
> That would be much preferred over the for_write_begin hack, given that
> write_begin really isn't a well defined method but a hacky hook for
> legacy write implementations.

So I don't need to worry about the control group stuff?  I'll still need some
way to flush a conflicting write whatever mechanism is being used to write to
the page cache.

David