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Re: kern/38265 (sometimes /kern directory can not be read)

Synopsis: sometimes /kern directory can not be read

State-Changed-From-To: open->closed
State-Changed-When: Thu, 15 Jan 2015 23:03:14 +0000
The problem described herein (the entire listing of /kern disappearing if
the root device vnodes get cleared from the vnode cache) was fixed some
time ago.

I seem to recall a second different problem that manifested with the same
symptoms, but I can't find any references to it; so I'm going to close this
PR and if anyone remembers/finds the other problem (or sees it again), let me
know or open a new PR.

There's also a contributing issue, which is that fts(3) is not robust in the
presence of errors; this is why the kernfs listing disappears instead of
reporting the error assocated with the root device vnodes. I'm going to
open a new PR on that if there isn't one already.

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