K 10 svn:author V 8 gallatin K 8 svn:date V 27 2019-10-24T18:39:05.532933Z K 7 svn:log V 546 Add a tunable to set the pgcache zone's maxcache When it is set to 0 (the default), a heavy Netflix-style web workload suffers from heavy lock contention on the vm page free queue called from vm_page_zone_{import,release}() as the buckets are frequently drained. When setting the maxcache, this contention goes away. We should eventually try to autotune this, as well as make this zone eligable for uma_reclaim(). Reviewed by: alc, markj Not Objected to by: jeff Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D22112 END