Re: [PATCH 14/15] xfs: use xfile_get_page and xfile_put_page in xfile_obj_store

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On Wed, Jan 03, 2024 at 04:20:24PM -0800, Darrick J. Wong wrote:
> On Wed, Jan 03, 2024 at 08:41:25AM +0000, Christoph Hellwig wrote:
> > Rewrite xfile_obj_store to use xfile_get_page and xfile_put_page to
> > access the data in the shmem page cache instead of abusing the
> > shmem write_begin and write_end aops.
> > 
> > Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> 
> Much simpler, though I wonder if willy is going to have something to say
> about xfile.c continuing to pass pages around instead of folios.  I
> /think/ that's ok since we actually need the physical base page for
> doing IO, right?

Well, as mentioned in the cover letter I'd much prefer to return a folio
here, but we'd first need to sort out the whole hwpoison flag mess for
that first.  There's also a few issues with the xfs-internal xfiles
interface that need attention, but they're solvable.





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