# Re: \[RESEND RFC PATCH 3/5\] mm/mmu\_notifier: remove lockdep map, allow mmu notifier to be used in nested scenarios

- From: Jason Gunthorpe \<jgg@ziepe.ca\>
- Date: 2020-09-04 12:03:54 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2020/09/6503091
- Thread: https://ratatoskr.run/linux-mm/2020/09/6503085/t.md

```text
On Fri, Sep 04, 2020 at 02:31:14PM +0300, Adalbert Lazăr wrote:
> From: Mircea Cirjaliu <redacted>
> 
> The combination of remote mapping + KVM causes nested range invalidations,
> which reports lockdep warnings.

You need a better solution than this, this lockdep is protecting a lot
of other more common code against various errors.

Jason
```