> On Jan 8, 2016, at 12:34, Gleb Smirnoff <gleb...@freebsd.org> wrote: > > Author: glebius > Date: Fri Jan 8 20:34:57 2016 > New Revision: 293439 > URL: https://svnweb.freebsd.org/changeset/base/293439 > > Log: > New sendfile(2) syscall. A joint effort of NGINX and Netflix from 2013 and > up to now. > > The new sendfile is the code that Netflix uses to send their multiple tens > of gigabits of data per second. The new implementation features asynchronous > I/O, when I/O operations are launched, but not awaited to be complete. An > explanation of why such behavior is beneficial compared to old one is > going to be too long for a commit message, so we will skip it here. > > Additional features of new syscall are extra flags, which provide an > application more control over data sent. The SF_NOCACHE flag tells > kernel that data shouldn't be cached after it was sent. The SF_READAHEAD() > macro allows to specify readahead size in pages. > > The new syscalls is a drop in replacement. No modifications are required > to applications. One can take nginx binary for stable/10 and run it > successfully on head. Although SF_NODISKIO lost its original sense, as now > sendfile doesn't block, and now means something completely different (tm), > using the new sendfile the old way is absolutely safe. > > Celebrates: Netflix global launch! > Sponsored by: Nginx, Inc. > Sponsored by: Netflix > Relnotes: yes
Did anyone review these changes and the other changes made recently to sys/kern and sys/net* ? Thanks, -NGie _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
