Re: [PATCH v2 4/7] iov_iter: new iov_iter_pin_pages*() routines

[David Hildenbrand]

On 22.09.22 16:36, Christoph Hellwig wrote:
> On Tue, Sep 20, 2022 at 06:02:11AM +0100, Al Viro wrote:
> > nvme target: nvme read requests end up with somebody allocating and filling
> > sglist, followed by reading from file into it (using ITER_BVEC).  Then the
> > pages are sent out, presumably
>
> Yes.
>
> > .  I would be very surprised if it turned out
> > to be anything other than anon pages allocated by the driver, but I'd like
> > to see that confirmed by nvme folks.  Probably doesn't need pinning.
>
> They are anon pages allocated by the driver using sgl_alloc().

I assume they are not anon pages as in "PageAnon()", but simply not 
pagecache pages, correct?

--
Thanks,

David / dhildenb