[Bug 293301] Kernel panic on tty switch

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293301

John Baldwin <jhb@FreeBSD.org> changed:

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--- Comment #4 from John Baldwin <jhb@FreeBSD.org> ---
My guess is that the drm driver is using a Linux work item that gets mapped
onto a taskqueue in its vd->vd_driver->vd_postswitch callback.  Maybe something
can be done to implement the emulation of work items to not use taskqueue, but
a simpler fix for this case might be to teach the atkbd driver to defer the
actual VT switch to a task instead of running it directly from the ithread? 
That last bit is probably simple to do at least.

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