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Note the removal of the ZERO_COPY_SOCKETS kernel option in r241931

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and provide a proper explanation.
This commit is contained in:
Andre Oppermann 2012-10-23 16:33:43 +00:00
parent a18562d935
commit cb69178dc0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=241955
1 changed files with 11 additions and 0 deletions
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@ -24,6 +24,17 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 10.x IS SLOW:
disable the most expensive debugging functionality run
"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