Reproducable deadlock in NFS client

[Peter Jeremy]

On 2019-Oct-03 23:28:07 +0000, Rick Macklem <rmacklem at uoguelph.ca> wrote:
>1 - kib@ just put a patch up on phabricator that reorganizes the handling
>      of vnode_pager_setsize().
>      D21883
>      (If you could test this patch, that might be the best approach.)

That fixes my problem.  I've added a note to D21883

>ps: Btw, capturing "procstat -kk" and "ps axHl" would give you/us more info.
>     (The "H" on "ps" shows the iod threads.)
>      If you can drop into the debugger when it is hung as above, you could
>      capture the stuff listed here:
>https://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-deadlocks.html

Thanks for the pointer and sorry for leaving that out.

-- 
Peter Jeremy
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