Author: andre
Date: Tue Oct 23 16:33:43 2012
New Revision: 241955
URL: http://svn.freebsd.org/changeset/base/241955
Log:
Note the removal of the ZERO_COPY_SOCKETS kernel option in r241931
and provide a proper explanation.
Modified:
head/UPDATING
Modified: head/UPDATING
==============================================================================
--- head/UPDATING Tue Oct 23 16:12:17 2012 (r241954)
+++ head/UPDATING Tue Oct 23 16:33:43 2012 (r241955)
@@ -25,6 +25,17 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 10
"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),
_______________________________________________
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"
