two KASANs in TTM logic

[Huang Rui]

On Fri, Sep 07, 2018 at 04:59:11PM +0800, Christian König wrote:
> Hi Ray,
> 
> in the meantime can we disable the feature once more in the kernel until 
> we have hammered out all possible corner cases?

That's fine. So far, we have to disable it again. I will do more testing
and repro the issue of Tom firstly.

> 
> As Tom figured out commenting out setting "bulk_moveable" to true should 
> be enough.

I saw you already remove the "bulk_moveable = true" in amdgpu_vm_init(), do
you point we also comment out the one in amdgpu_vm_move_to_lru_tail() to
disable bulk_move totally for the moment?

Thanks,
Ray

> 
> Thanks,
> Christian.
> 
> Am 07.09.2018 um 08:51 schrieb Huang, Ray:
> > Hi Tom,
> >
> > Thanks to trace this issue.  I am trying to reproduce it on amd-staging-drm-next with piglit.
> > May I know the steps/configurations to repro it?
> >
> > Thanks,
> > Ray
> >
> > -----Original Message-----
> > From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Tom St Denis
> > Sent: Wednesday, September 5, 2018 9:27 PM
> > To: Koenig, Christian <Christian.Koenig at amd.com>; Daenzer, Michel <Michel.Daenzer at amd.com>; amd-gfx at lists.freedesktop.org; Deucher, Alexander <Alexander.Deucher at amd.com>
> > Subject: Re: two KASANs in TTM logic
> >
> > Logs attached.
> >
> > Tom
> >
> >
> >
> > On 09/05/2018 08:02 AM, Christian König wrote:
> >> Still not the slightest idea what is causing this and the patch
> >> definitely fixes things a lot.
> >>
> >> Can you try to enable list debugging in your kernel?
> >>
> >> Thanks,
> >> Christian.
> >>
> >> Am 04.09.2018 um 19:18 schrieb Tom St Denis:
> >>> Sure:
> >>>
> >>> d2917f399e0b250f47d07da551a335843a24f835 is the first bad commit
> >>> commit d2917f399e0b250f47d07da551a335843a24f835
> >>> Author: Christian König <christian.koenig at amd.com>
> >>> Date:   Thu Aug 30 10:04:53 2018 +0200
> >>>
> >>>      drm/amdgpu: fix "use bulk moves for efficient VM LRU handling" v2
> >>>
> >>>      First step to fix the LRU corruption, we accidentially tried to
> >>> move things
> >>>      on the LRU after dropping the lock.
> >>>
> >>>      Signed-off-by: Christian König <christian.koenig at amd.com>
> >>>      Tested-by: Michel Dänzer <michel.daenzer at amd.com>
> >>>
> >>> :040000 040000 ed5be1ad4da129c4154b2b43acf7ef349a470700
> >>> 0008c4e2fb56512f41559618dd474c916fc09a37 M      drivers
> >>>
> >>>
> >>> The commit before that I can run xonotic-glx and piglit on my Carrizo
> >>> without a KASAN.
> >>>
> >>> Tom
> >>>
> >>> On 09/04/2018 10:05 AM, Christian König wrote:
> >>>> The first one should already be fixed.
> >>>>
> >>>> Not sure where the second comes from. Can you narrow that down further?
> >>>>
> >>>> Christian.
> >>>>
> >>>> Am 04.09.2018 um 15:46 schrieb Tom St Denis:
> >>>>> First is caused by this commit while running a GL heavy application.
> >>>>>
> >>>>> d78c1fa0c9f815fe951fd57001acca3d35262a17 is the first bad commit
> >>>>> commit d78c1fa0c9f815fe951fd57001acca3d35262a17
> >>>>> Author: Michel Dänzer <michel.daenzer at amd.com>
> >>>>> Date:   Wed Aug 29 11:59:38 2018 +0200
> >>>>>
> >>>>>      Revert "drm/amdgpu: move PD/PT bos on LRU again"
> >>>>>
> >>>>>      This reverts commit 31625ccae4464b61ec8cdb9740df848bbc857a5b.
> >>>>>
> >>>>>      It triggered various badness on my development machine when
> >>>>> running the
> >>>>>      piglit gpu profile with radeonsi on Bonaire, looks like memory
> >>>>>      corruption due to insufficiently protected list manipulations.
> >>>>>
> >>>>>      Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
> >>>>>      Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> >>>>>
> >>>>> :040000 040000 b7169f0cf0c7decec631751a9896a92badb67f9d
> >>>>> 42ea58f43199d26fc0c7ddcc655e6d0964b81817 M      drivers
> >>>>>
> >>>>> The second is caused by something between that and the tip of the
> >>>>> 4.19-rc1 amd-staging-drm-next (I haven't pinned it down yet) while
> >>>>> loading GNOME.
> >>>>>
> >>>>> Tom
> >>>>>
> >>>>>
> >>>>>
> >>>>> _______________________________________________
> >>>>> amd-gfx mailing list
> >>>>> amd-gfx at lists.freedesktop.org
> >>>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
> > _______________________________________________
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