https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194979
Bug ID: 194979
Summary: uart_intr leads to "bad stray interrupt" under
pressure
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: Needs Triage
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 149349
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=149349&action=edit
Setup uart_intr() as both filter and hander
Broken by:
https://svnweb.freebsd.org/base?view=revision&revision=253161
With this, uart_intr() can return FILTER_SCHEDULE_THREAD, but we don't setup a
threaded handler, which leads to the panic.
Since the handling in uart_intr() looks MP-safe now, the attached patch should
do the trick.
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