[PATCH v3 0/8] drm: Introduce sparse GEM shmem

[Boris Brezillon]

On Fri, 11 Apr 2025 15:13:26 +0200
Christian König <christian.koenig at amd.com> wrote:

> >  
> >> Background is that you don't get a crash, nor error message, nor
> >> anything indicating what is happening.  
> > The job times out at some point, but we might get stuck in the fault
> > handler waiting for memory, which is pretty close to a deadlock, I
> > suspect.  
> 
> I don't know those drivers that well, but at least for amdgpu the
> problem would be that the timeout handling would need to grab some of
> the locks the memory management is holding waiting for the timeout
> handling to do something....
> 
> So that basically perfectly closes the circle. With a bit of lock you
> get a message after some time that the kernel is stuck, but since
> that are all sleeping locks I strongly doubt so.
> 
> As immediately action please provide patches which changes those
> GFP_KERNEL into GFP_NOWAIT.

Sure, I can do that.