RE: [PATCH v4 5/6] drm/gem-shmem: Track folio accessed/dirty status in mmap

Biju Das
2026-03-13T08:41:35Z

> -----Original Message-----
> From: Thomas Zimmermann <tzimmermann@suse.de>
> Sent: 13 March 2026 08:01
> Subject: Re: [PATCH v4 5/6] drm/gem-shmem: Track folio accessed/dirty status in mmap
>
> Hi
>
> Am 13.03.26 um 07:44 schrieb Biju Das:
> >
> >> -----Original Message-----
> >> From: dri-devel <dri-devel-bounces@lists.freedesktop.org> On Behalf
> >> Of Biju Das
> >> Sent: 12 March 2026 17:47
> >> To: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>; Thomas
> >> Zimmermann <tzimmermann@suse.de>
> >> Cc: boris.brezillon@collabora.com; loic.molinari@collabora.com;
> >> willy@infradead.org; frank.binns@imgtec.com; matt.coster@imgtec.com;
> >> maarten.lankhorst@linux.intel.com; mripard@kernel.org;
> >> airlied@gmail.com; simona@ffwll.ch; linux-mm@kvack.org;
> >> dri-devel@lists.freedesktop.org
> >> Subject: RE: [PATCH v4 5/6] drm/gem-shmem: Track folio accessed/dirty
> >> status in mmap
> >>
> >> Hi Tommaso,
> >>
> >>> -----Original Message-----
> >>> From: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
> >>> Sent: 12 March 2026 17:37
> >>> Subject: Re: [PATCH v4 5/6] drm/gem-shmem: Track folio
> >>> accessed/dirty status in mmap
> >>>
> >>> Hi Thomas,
> >>> Thanks for your patch.
> >>>
> >>> I'm working on DSI support for RZ/G3E from this morning rebasing on
> >>> top of next-20260311 I'm seeing that weston hang on my side:
> >>>
> >>> Reverting this patch fix the issue.
> >>> (git revert 28e3918179aa)
> >>>
> >>> I'm wondering if anyone encountered this issue?
> >>> Thanks in advance.
> >>
> >> I am also seeing same issue on RZ/G3L with weston.
> > Just add I am using mesa with panfrost(Mali-G31) on RZ/G3L.
>
> I ran the tests with bochs.  I don't have panfrost hardware to test with, but nothing in the driver
> sticks out as problematic. Only the gem open/close logic looks a bit awkward. The mmap code appears to
> be identical.
>
> >
> > Disabling Mali-G31 renders weston desktop during boot.
> >
> > Looks like this patch is creating some hang in panfrost driver
> > during weston launch.
>
> Does either of you see any warnings in the kernel messages?

There is no kernel messages

[ OK ] Finished Virtual Console Setup.
[ OK ] Started User Manager for UID 1000.
[ OK ] Started Session c1 of User weston.

Cheers,
Biju