[Intel-gfx] [PATCH 1/2] drm/i915/gem: Replace reloc chain with terminator on error unwind

[Pavel Machek]

Hi!

> > Yep, my machines are low on memory.
> > 
> > But ... test did not work that well. I have dead X and blinking
> > screen. Machine still works reasonably well over ssh, so I guess
> > that's an improvement.
> 
> > [ 7744.718473] BUG: unable to handle page fault for address: f8c00000
> > [ 7744.718484] #PF: supervisor write access in kernel mode
> > [ 7744.718487] #PF: error_code(0x0002) - not-present page
> > [ 7744.718491] *pdpt = 0000000031b0b001 *pde = 0000000000000000 
> > [ 7744.718500] Oops: 0002 [#1] PREEMPT SMP PTI
> > [ 7744.718506] CPU: 0 PID: 3004 Comm: Xorg Not tainted 5.9.0-rc1-next-20200819+ #134
> > [ 7744.718509] Hardware name: LENOVO 17097HU/17097HU, BIOS 7BETD8WW (2.19 ) 03/31/2011
> > [ 7744.718518] EIP: eb_relocate_vma+0xdbf/0xf20
> 
> To save me guessing, paste the above location into
> 	./scripts/decode_stacktrace.sh ./vmlinux . ./drivers/gpu/drm/i915
> 
> The f8c00000 is something running off the end of a kmap, but I didn't
> spot a path were we would ignore an error and keep on writing.
> Nevertheless it must exist.

Like this?

$ ./scripts/decode_stacktrace.sh ./vmlinux . ./drivers/gpu/drm/i915
f8c00000
f8c00000
eb_relocate_vma+0xdbf/0xf20
eb_relocate_vma (i915_gem_execbuffer.c:?) 

									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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