K 10 svn:author V 7 glebius K 8 svn:date V 27 2014-03-19T12:30:44.206579Z K 7 svn:log V 284 Implement optional (default to 0) readahead for the new sendfile. If readahead is enabled, and vm_pager_has_page() hints us that we can do more pages in a single I/O than socket can consume, then we preload that much pages to memory. Sponsored by: Netflix Sponsored by: Nginx, Inc. END