Re: Bad rss-counter state from drm/ttm, drm/vmwgfx: Support huge TTM pagefaults

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On 4/6/20 9:51 PM, Alex Xu (Hello71) wrote:
Using 314b658 with amdgpu, starting sway and firefox causes "BUG: Bad
rss-counter state" and "BUG: non-zero pgtables_bytes on freeing mm" to
start filling dmesg, and then closing programs causes more BUGs and
hangs, and then everything grinds to a halt (can't start more programs,
can't even reboot through systemd).

Using master and reverting that branch up to that point fixes the
problem.

I'm using a Ryzen 1600 and AMD Radeon RX 480 on an ASRock B450 Pro4
board with IOMMU enabled.

Hmm. That sounds bad. Could you send a copy of your config?

Meanwhile, I'll prepare a small patch that disables the non-vmwgfx huge_fault() until we've figured out what's happening.

/Thomas






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