Re: WARNING in memtype_reserve

[Dmitry Vyukov]

On Thu, May 14, 2020 at 8:14 AM Christoph Hellwig <hch@xxxxxx> wrote:
>
> Guys, can you please start formal thread on this?  I have no
> idea where this came from and what the rationale is.  Btw, if the
> pfn is crap in dma_direct_mmap then the dma_addr_t passed in is
> crap, as it is derived from that.  What is the caller, and how is
> this triggered?

FWIW the whole thread is available on lore:
https://lore.kernel.org/lkml/20200514061417.GA8367@xxxxxx/T/#t