Re: [PATCH v2 01/12] fs-verity: add a documentation file

[Christoph Hellwig]

On Tue, Dec 18, 2018 at 11:16:08PM -0800, Linus Torvalds wrote:
> On Tue, Dec 18, 2018, 23:11 Christoph Hellwig <hch@xxxxxxxxxxxxx wrote:
> 
> >
> > I think the fd would have to be on the same fs for this interface to
> > make sense. But it could be an O_TMPFILE one.  And given that ext4
> > already supports a variant of swapext this interface should also work
> > with the existing ext4 on disk format.
> >
> 
> Why is the merkle tree not just an xattr of the file?

Because it is too large for our awkward xattrs interface..