[Mesa-dev] [PATCH 1/2] radeonsi: set a per-buffer flag that disables inter-process sharing (v4)

[Marek Olšák]

Well, this patch shouldn't change behavior. Are you sure it's not some
random thing? I know, for example, that SI isn't very stable with piglit on
radeon either.

Marek

On Sep 1, 2017 12:28 PM, "Michel Dänzer" <michel at daenzer.net> wrote:

> On 01/09/17 07:23 PM, Nicolai Hähnle wrote:
> > On 01.09.2017 11:58, Michel Dänzer wrote:
> >> On 29/08/17 11:47 PM, Christian König wrote:
> >>> From: Marek Olšák <marek.olsak at amd.com>
> >>>
> >>> For lower overhead in the CS ioctl.
> >>> Winsys allocators are not used with interprocess-sharable resources.
> >>>
> >>> v2: It shouldn't crash anymore, but the kernel will reject the new
> flag.
> >>> v3 (christian): Rename the flag, avoid sending those buffers in the
> >>> BO list.
> >>> v4 (christian): Remove setting the kernel flag for now
> >>
> >> This change seems to have caused a GPU hang when running piglit on my
> >> Kaveri with the radeon kernel driver. Haven't been able to isolate it to
> >> a specific test, seems to only happen when running multiple tests
> >> concurrently. There's a GPUVM fault before the hang, I suspect it's
> >> related:
> >>
> >> radeon 0000:00:01.0: GPU fault detected: 146 0x0ae6760c
> >> radeon 0000:00:01.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x000001D7
> >> radeon 0000:00:01.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0607600C
> >> VM fault (0x0c, vmid 3) at page 471, read from 'CPF' (0x43504600) (118)
> >>
> >>
> >> Any ideas?
> >
> > Only that "read from CPF" means it can only be one of:
> >
> > - command buffers
> > - indirect draw data
> > - predication data (conditional render)
> >
> > (I hope I didn't miss anything)
> >
> > Hmm, actually, I think CI has unavoidable VM faults related to
> > ARB_sparse_buffers, so this may be benign. You could try to exclude the
> > ARB_sparse_buffers tests.
>
> GL_ARB_sparse_buffer isn't supported with the radeon kernel driver AFAICT.
>
>
> --
> Earthling Michel Dänzer               |               http://www.amd.com
> Libre software enthusiast             |             Mesa and X developer
>
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