Re: [PATCH v3 1/4] mm: Fix invalid page pointer returned with FOLL_PIN gups

John Hubbard
2022-02-03T21:13:57Z

On 2/3/22 06:00, Christoph Hellwig wrote:
> On Thu, Feb 03, 2022 at 01:32:29AM -0800, John Hubbard wrote:
>> From: Peter Xu <peterx@redhat.com>
>>
>> Alex reported invalid page pointer returned with pin_user_pages_remote() from
>> vfio after upstream commit 4b6c33b32296 ("vfio/type1: Prepare for batched
>> pinning with struct vfio_batch"). This problem breaks NVIDIA vfio mdev.
>
> There still isn't any nvidia vfio mdev driver in the tree, so this
> changelog stilldoesn't make sense.

I'll remove that last sentence (and put in a tiny note that I'm scribbling
on Peter's commit description a little bit more), in order to avoid any
references to out of tree things.

thanks,
--
John Hubbard
NVIDIA