From e644f55413ad7bfbb96b57ea68459b71bdbeae29 Mon Sep 17 00:00:00 2001 From: andre Date: Tue, 23 Oct 2012 16:33:43 +0000 Subject: Note the removal of the ZERO_COPY_SOCKETS kernel option in r241931 and provide a proper explanation. --- UPDATING | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'UPDATING') diff --git a/UPDATING b/UPDATING index 78ea38d..0127ee9 100644 --- a/UPDATING +++ b/UPDATING @@ -25,6 +25,17 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 10.x IS SLOW: "ln -s 'abort:false,junk:false' /etc/malloc.conf".) 20121023: + The ZERO_COPY_SOCKET kernel option has been removed and + split into SOCKET_SEND_COW and SOCKET_RECV_PFLIP. + NB: SOCKET_SEND_COW uses the VM page based copy-on-write + mechanism which is not safe and may result in kernel crashes. + NB: The SOCKET_RECV_PFLIP mechanism is useless as no current + driver supports disposeable external page sized mbuf storage. + Proper replacements for both zero-copy mechanisms are under + consideration and will eventually lead to complete removal + of the two kernel options. + +20121023: The IPv4 network stack has been converted to network byte order. The following modules need to be recompiled together with kernel: carp(4), divert(4), gif(4), siftr(4), gre(4), -- cgit v1.1