Re: [PATCH v2] drm/ttm: Fix GPU MM stats during pool shrinking

[Matthew Brost <matthew.brost@intel.com>]

On Mon, May 04, 2026 at 01:56:25PM +1000, Dave Airlie wrote:
> On Sat, 2 May 2026 at 18:14, Kenneth Crudup <kenny@panix.com> wrote:
> >
> >
> >
> > On 5/1/26 23:53, Matthew Brost wrote:
> > > TTM pool shrinking frees pages by calling __free_pages() directly,
> > > which bypasses updates to NR_GPU_ACTIVE and leaves GPU MM accounting
> > > out of sync.
> > >
> > > Introduce a helper, __free_pages_gpu_account(), and use it for all page
> > > frees in ttm_pool.c so GPU MM statistics are updated consistently.
> > >
> > > Reported-by: Kenneth Crudup <kenny@panix.com>
> > > Fixes: ae80122f3896 ("drm/ttm: use gpu mm stats to track gpu memory allocations. (v4)")
> > > Cc: Christian Koenig <christian.koenig@amd.com>
> > > Cc: Huang Rui <ray.huang@amd.com>
> > > Cc: Matthew Auld <matthew.auld@intel.com>
> > > Cc: David Airlie <airlied@gmail.com>
> > > Cc: dri-devel@lists.freedesktop.org
> > > Signed-off-by: Matthew Brost <matthew.brost@intel.com>
> > >
> > > ---
> > >
> > > v2:
> 
> Oops, good catch,
> 
> Reviewed-by: Dave Airlie <airlied@redhat.com>

Thanks! Merged to drm-misc-fixes.

Matt

> 
> Dave.