From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 196685] System becomes unresponsive after intel_iommu kernel
 error
Date: Sat, 19 Aug 2017 17:03:15 +0000
Message-ID: <bug-196685-28872-OcWzWS0lKD@https.bugzilla.kernel.org/>
References: <bug-196685-28872@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=196685

--- Comment #10 from Jeff Cook (jeff@jeffcook.io) ---
Created attachment 258019
  --> https://bugzilla.kernel.org/attachment.cgi?id=258019&action=edit
oops trace from logs

On this particular error condition, the passthrough'd VM locks, but the host
system and other VMs initially remain responsive via SSH. They too fail after
issuing a few commands. Messages indicating a stall are emitted regularly until
the machine is rebooted:

kernel: INFO: rcu_preempt detected stalls on CPUs/tasks:
kernel: Tasks blocked on level-1 rcu_node (CPUs 0-15): P2837
kernel: (detected by 23, t=990092 jiffies, g=2933189, c=2933188, q=9740206)

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