quoted

I see the issue.  I have to go over the details in the driver, but I
think it should be sufficient to remove the WARN().  When the page_pool
was integrated with the MM-layer, being invoked from the put_page()
call itself, this would indicate a likely API misuse.  But now, with
the page refcnt based recycle tricks, it is the norm (for non-XDP) that
put_page is called without the knowledge of page_pool.

I see, I'll remove the WARN and test.

Verified, it works. Please fix in next patchset.

Thanks.