Quoting Pavel Machek (2020-08-19 20:47:23)
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:?)
Ok, that didn't work as well as I'm used to. Thanks, -Chris