Regression: bisected: AMDGPU causes Kernel Bad page state OOPS starting with kernels 5.11.x, 5.12.x, 5.13-rc

[Luís Mendes]

Thanks!

I've just created: https://gitlab.freedesktop.org/drm/amd/-/issues/1606

Regards,
Luis

On Tue, May 25, 2021 at 3:02 PM Christian König
<ckoenig.leichtzumerken at gmail.com> wrote:
>
> Hi Luis,
>
> adding Daniel as well.
>
> first of all can you please create a bug report for this here:
> https://gitlab.freedesktop.org/drm/amd/-/issues This way we can better
> track issues.
>
> Then what seems to happen is that somebody is using the TTM pages in a
> way they are not supposed to be used.
>
> We have found a bunch of bugs in for example KVM since adding that
> commit and I have the strong suspicion that is just another one of those.
>
> Regards,
> Christian.
>
> Am 24.05.21 um 21:25 schrieb Luís Mendes:
> > Hi,
> >
> > AMDGPU was working fine on my armhf systems with 5.10.x and previous
> > kernels and a RX550 card. Unfortunately I have only now tested kernels
> > 5.11.x, 5.12.x and 5.13-rc and all are now showing problems like this
> > one:
> > May 10 20:23:14 picolo kernel: [   18.967626] BUG: Bad page state in
> > process gnome-shell  pfn:78c08
> > May 10 20:23:14 picolo kernel: [   18.973750] page:ce2e9717 refcount:2
> > mapcount:1 mapping:17edced0 index:0x109e9 pfn:0x78c08
> > May 10 20:23:14 picolo kernel: [   18.973763] aops:0xc0e12f54 ino:30d
> >
> > Full Kernel boot log is here
> > https://pastebin.com/pcuUWXbj
> >
> > I've bisected and traced the problem to this commit:
> > e93b2da9799e5cb97760969f3e1f02a5bdac29fe is the first bad commit
> > commit e93b2da9799e5cb97760969f3e1f02a5bdac29fe
> > Author: Christian König <christian.koenig at amd.com>
> > Date:   Sat Oct 24 13:11:29 2020 +0200
> >
> >      drm/amdgpu: switch to new allocator v2
> >
> >      It should be able to handle all cases here.
> >
> >      v2: fix debugfs as well
> >
> >      Signed-off-by: Christian König <christian.koenig at amd.com>
> >      Reviewed-by: Dave Airlie <airlied at redhat.com>
> >      Reviewed-by: Madhav Chauhan <madhav.chauhan at amd.com>
> >      Tested-by: Huang Rui <ray.huang at amd.com>
> >      Link: https://patchwork.freedesktop.org/patch/397086/?series=83051&rev=1
> >
> >   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 45 ++++++++++-----------------------
> >   1 file changed, 14 insertions(+), 31 deletions(-)
> >
> > Detailed bisect log is here:
> > https://bin.privacytools.io/?a88ae63fb95fa1c1#EtrC4qxGWjmgy5C3dBzXFGqjxc7znTKULtz4cxoYFxW5
> >
> > Best regards,
> > Luís Mendes
> > Aparapi developer
> > PhD Student & Researcher
> > _______________________________________________
> > amd-gfx mailing list
> > amd-gfx at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>