2c14385aa2
r356147 removed a vm_page_activate() call, but this is required to ensure that pages end up in the page queues in the first place. Restore the pre-r356157 logic. Now, without the page lock, the vm_page_active() check is racy, but this race is harmless. Reviewed by: alc, kib Reported and tested by: pho Differential Revision: https://reviews.freebsd.org/D23024
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