30fbfdda6c
vmd_free_count manipulation. Reduce the scope of the free lock by using a pageout lock to synchronize sleep and wakeup. Only trigger the pageout daemon on transitions between states. Drive all wakeup operations directly as side-effects from freeing memory rather than requiring an additional function call. Reviewed by: markj, kib Tested by: pho Sponsored by: Netflix, Dell/EMC Isilon Differential Revision: https://reviews.freebsd.org/D14612
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