K 10
svn:author
V 3
alc
K 8
svn:date
V 27
2016-11-27T01:42:53.813480Z
K 7
svn:log
V 590
Recursion on the free page queue mutex occurred when UMA needed to allocate
a new page of radix trie nodes to complete a vm_radix_insert() operation
that was requested by vm_page_cache().  Specifically, vm_page_cache()
already held the free page queue lock when UMA tried to acquire it through
a call to vm_page_alloc().  This code path no longer exists, so there is no
longer any reason to allow recursion on the free page queue mutex.

Improve nearby comments.

Reviewed by:	kib, markj
Tested by:	pho
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D8628

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