[Bug 280846] Low memory freezes / OOM: a thread waited too long to allocate a page

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280846

--- Comment #47 from Mark Johnston <markj@FreeBSD.org> ---
(In reply to Mark Millard from comment #46)
My wording wasn't very good.  I was speculating about the contents of the
laundry queue on Henrich's system specifically.  You're right that process exit
can also reclaim pages (from the laundry queue), but here I'm assuming that
many of the laundry queue pages there are owned by firefox.

The inactive queue contains a mix of clean and dirty pages.  The queue is
scanned only when there is memory pressure.  "Recently referenced" pages are
moved back to the active queue or requeued to the tail of the inactive queue. 
Unreferenced pages found to be dirty during a scan are moved to the laundry
queue, while clean pages are reclaimed on the spot.

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