lo: update man page since SCTP checksum offloading is supported

The loopback interface supports SCTP checksum offloading in
addition to TCP and UDP.
Reviewed by: gbe
MFC after: 1 week
Differential

lo: update man page since SCTP checksum offloading is supported

The loopback interface supports SCTP checksum offloading in
addition to TCP and UDP.
Reviewed by: gbe
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D45698

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share: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl

share: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

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Remove $FreeBSD$: one-line nroff pattern

Remove /^\.\\"\s*\$FreeBSD\$$\n/

Merge ^/head r314420 through r314481.

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

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MFC

IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib

Do not mention SIOCSIFADDR.

Merge from head

- Merge from HEAD

Teach the loopback interface about checksum generation and validation
avoidance:

- Enable setting the RXCSUM and TXCSUM flags for loopback interfaces;
set both by default.
- When RXCSUM is set, fl

Teach the loopback interface about checksum generation and validation
avoidance:

- Enable setting the RXCSUM and TXCSUM flags for loopback interfaces;
set both by default.
- When RXCSUM is set, flag packets sent over the loopback interface as
having checked and valid IP, UDP, TCP checksums so that higher
protocol layers won't check them.
- Always clear CSUM_{IP,UDP_TCP} checksum required flags on transmit,
as they will have gotten there as a result of TXCSUM being set.

This is done only for packets explicitly sent over the loopback, not
simulated loopback via if_simloop() due to !SIMPLEX interfaces, etc.

Note that enabling TXCSUM but not RXCSUM will lead to unhappiness, as
checksums won't be generated but will be validated.

Kris reports that this leads to significant performance improvements
in loopback benchmarking with TCP and UDP for throughput:

RXCSUM RXCSUM+TXCSUM
TCP 15% 37%
UDP 10% 74%

Update man page.

Reviewed by: sam
Tested by: kris
MFC after: 1 week

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mdoc(7) police: removed HISTORY info from the .Os call.

pseudo-device -> device in kernel config lines. Removed whitespace at EOL.
Reviewed by: joerg, dd

$Id$ -> $FreeBSD$

Use Cd macro for SYNOPSIS.

PR: docs/10495

Revert $FreeBSD$ back to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

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Sort cross references.

Do not install the now unsupported netns and netiso
related man pages. Comment out cross references to those man
pages from other man pages.

BSD 4.4 Lite Share Sources

- Merge from HEAD

Teach the loopback interface about checksum generation and validation
avoidance:

- Enable setting the RXCSUM and TXCSUM flags for loopback interfaces;
set both by default.
- When RXCSUM is set, fl

Teach the loopback interface about checksum generation and validation
avoidance:

- Enable setting the RXCSUM and TXCSUM flags for loopback interfaces;
set both by default.
- When RXCSUM is set, flag packets sent over the loopback interface as
having checked and valid IP, UDP, TCP checksums so that higher
protocol layers won't check them.
- Always clear CSUM_{IP,UDP_TCP} checksum required flags on transmit,
as they will have gotten there as a result of TXCSUM being set.

This is done only for packets explicitly sent over the loopback, not
simulated loopback via if_simloop() due to !SIMPLEX interfaces, etc.

Note that enabling TXCSUM but not RXCSUM will lead to unhappiness, as
checksums won't be generated but will be validated.

Kris reports that this leads to significant performance improvements
in loopback benchmarking with TCP and UDP for throughput:

RXCSUM RXCSUM+TXCSUM
TCP 15% 37%
UDP 10% 74%

Update man page.

Reviewed by: sam
Tested by: kris
MFC after: 1 week

show more ...

mdoc(7) police: removed HISTORY info from the .Os call.

pseudo-device -> device in kernel config lines. Removed whitespace at EOL.
Reviewed by: joerg, dd

$Id$ -> $FreeBSD$