Author: markj Date: Thu Sep 17 16:49:28 2020 New Revision: 365841 URL: https://svnweb.freebsd.org/changeset/base/365841
Log: Increase the default vm.max_user_wired value. Since r347532 (merged to stable/12) we only count user-wired pages towards the system limit. However, we now also treat pages wired by hypervisors (bhyve and virtualbox) as user-wired, so starting VMs with large amounts of RAM tends to fail due to the low limit. The purpose of the limit is to provide a seatbelt, not to impose some policy on the use of wired memory. Thus, increase the default limit to allow reasonable VM configurations to work without tuning. Reviewed by: kib Discussed with: dougm MFC after: 3 days Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D26424 Modified: head/sys/vm/vm_pageout.c Modified: head/sys/vm/vm_pageout.c ============================================================================== --- head/sys/vm/vm_pageout.c Thu Sep 17 16:44:12 2020 (r365840) +++ head/sys/vm/vm_pageout.c Thu Sep 17 16:49:28 2020 (r365841) @@ -2295,7 +2295,7 @@ vm_pageout_init_domain(int domain) static void vm_pageout_init(void) { - u_int freecount; + u_long freecount; int i; /* @@ -2328,8 +2328,13 @@ vm_pageout_init(void) if (vm_pageout_update_period == 0) vm_pageout_update_period = 600; + /* + * Set the maximum number of user-wired virtual pages. Historically the + * main source of such pages was mlock(2) and mlockall(2). Hypervisors + * may also request user-wired memory. + */ if (vm_page_max_user_wired == 0) - vm_page_max_user_wired = freecount / 3; + vm_page_max_user_wired = 4 * freecount / 5; } /* _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
