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a text file with a list of physical memory addresses to exclude, and have it loaded at boot time via the provided example in loader.conf. The tunable 'vm.blacklist' remains, but using an external file means that there's no practical limit to the size of the list. This change also improves the scanning algorithm for processing the list, scanning the list only once instead of scanning it for every page in the system. Both the sysctl and the file can be unsorted and contain duplicates so long as each entry is numeric (decimal or hex) and is separated by a space, comma, or newline character. The sysctl 'vm.page_blacklist' is now provided to report what memory locations were successfully excluded. Reviewed by: imp, emax Obtained from: Netflix, Inc. MFC after: 3 days
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