On Tue, Oct 23, 2012 at 02:19:45PM +0000, Andre Oppermann wrote: A> Author: andre A> Date: Tue Oct 23 14:19:44 2012 A> New Revision: 241931 A> URL: http://svn.freebsd.org/changeset/base/241931 A> A> Log: A> Replace the ill-named ZERO_COPY_SOCKET kernel option with two A> more appropriate named kernel options for the very distinct A> send and receive path. A> A> "options SOCKET_SEND_COW" enables VM page copy-on-write based A> sending of data on an outbound socket. A> A> NB: The COW based send mechanism is not safe and may result A> in kernel crashes. A> A> "options SOCKET_RECV_PFLIP" enables VM kernel/userspace page A> flipping for special disposable pages attached as external A> storage to mbufs. A> A> Only the naming of the kernel options is changed and their A> corresponding #ifdef sections are adjusted. No functionality A> is added or removed. A> A> Discussed with: alc (mechanism and limitations of send side COW)
Users may call this a pointless POLA violation. IMO, the old kernel option that we had for years, more than a decade, should remain and just imply two new kernel options. -- Totus tuus, Glebius. _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
