[Bug 201825] Guest freezes during high IO load, host partially freezes, stack points to try_async_pf

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https://bugzilla.kernel.org/show_bug.cgi?id=201825

--- Comment #6 from Larkin Lowrey (llowrey@xxxxxxxxxxxxxxxxx) ---
Created attachment 280779
  --> https://bugzilla.kernel.org/attachment.cgi?id=280779&action=edit
sysrq-l: More async page fault problems

Slightly different with 4.19.10-300.fc29.x86_64.

The virsh commands 'list' and 'start' hang. The process "[kworker/21:2+events]"
is at 100% and is trying to run "async_pf_execute".

See attached stack trace dump.

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