On 2021-11-03 21:32 +0100, Karol Herbst wrote:
> On Wed, Nov 3, 2021 at 9:29 PM Karol Herbst <kher...@redhat.com> wrote:
>>
>> On Wed, Nov 3, 2021 at 8:52 PM Sven Joachim <svenj...@gmx.de> wrote:
>> >
>> > On 2021-11-01 10:17 +0100, Greg Kroah-Hartman wrote:
>> >
>> > > From: Christian König <christian.koe...@amd.com>
>> > >
>> > > commit 0db55f9a1bafbe3dac750ea669de9134922389b5 upstream.
>> > >
>> > > We need to cleanup the fences for ghost objects as well.
>> > >
>> > > Signed-off-by: Christian König <christian.koe...@amd.com>
>> > > Reported-by: Erhard F. <erhar...@mailbox.org>
>> > > Tested-by: Erhard F. <erhar...@mailbox.org>
>> > > Reviewed-by: Huang Rui <ray.hu...@amd.com>
>> > > Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214029
>> > > Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214447
>> > > CC: <sta...@vger.kernel.org>
>> > > Link:
>> > > https://patchwork.freedesktop.org/patch/msgid/20211020173211.2247-1-christian.koe...@amd.com
>> > > Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
>> > > ---
>> > > drivers/gpu/drm/ttm/ttm_bo_util.c | 1 +
>> > > 1 file changed, 1 insertion(+)
>> > >
>> > > --- a/drivers/gpu/drm/ttm/ttm_bo_util.c
>> > > +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
>> > > @@ -322,6 +322,7 @@ static void ttm_transfered_destroy(struc
>> > > struct ttm_transfer_obj *fbo;
>> > >
>> > > fbo = container_of(bo, struct ttm_transfer_obj, base);
>> > > + dma_resv_fini(&fbo->base.base._resv);
>> > > ttm_bo_put(fbo->bo);
>> > > kfree(fbo);
>> > > }
>> >
>> > Alas, this innocuous looking commit causes one of my systems to lock up
>> > as soon as run startx. This happens with the nouveau driver, two other
>> > systems with radeon and intel graphics are not affected. Also I only
>> > noticed it in 5.10.77. Kernels 5.15 and 5.14.16 are not affected, and I
>> > do not use 5.4 anymore.
>> >
>> > I am not familiar with nouveau's ttm management and what has changed
>> > there between 5.10 and 5.14, but maybe one of their developers can shed
>> > a light on this.
>> >
>> > Cheers,
>> > Sven
>> >
>>
>> could be related to 265ec0dd1a0d18f4114f62c0d4a794bb4e729bc1
>
> maybe not.. but I did remember there being a few tmm related patches
> which only hurt nouveau :/ I guess one could do a git bisect to
> figure out what change "fixes" it.
Maybe, but since the memory leaks reported by Erhard only started to
show up in 5.14 (if I read the bugzilla reports correctly), perhaps the
patch should simply be reverted on earlier kernels?
> On which GPU do you see this problem?
On an old GeForce 8500 GT, the whole PC is rather ancient.
Cheers,
Sven
