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vtnet.4: update description of loader tunables

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This is based on the description of sysctl -d.

Reviewed by:		Timo Völker, bcr
MFC after:		1 week
Differential Revision:	https://reviews.freebsd.org/D51604
This commit is contained in:
Michael Tuexen 2025-07-29 09:17:52 +02:00
parent fe35f275ab
commit 0ded464721
1 changed files with 22 additions and 1 deletions
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23
share/man/man4/vtnet.4
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@ -22,7 +22,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd January 22, 2012
.Dd July 29, 2025
.Dt VTNET 4
.Os
.Sh NAME
@ -70,6 +70,11 @@ prompt before booting the kernel or stored in
.It Va hw.vtnet. Ns Ar X Ns Va .csum_disable
This tunable disables receive and send checksum offload.
The default value is 0.
.It Va hw.vtnet.fixup_needs_csum
.It Va hw.vtnet. Ns Ar X Ns Va .fixup_needs_csum
This tunable enforces the calculation of a valid checksum for NEEDS_CSUM
packets.
The default value is 0.
.It Va hw.vtnet.tso_disable
.It Va hw.vtnet. Ns Ar X Ns Va .tso_disable
This tunable disables TSO.
@ -91,6 +96,22 @@ The number of queue pairs used is the lesser of the maximum supported by the
driver and the hypervisor, the number of CPUs present in the guest, and this
tunable if not zero.
The default value is 0.
.It Va hw.vtnet.tso_maxlen
.It Va hw.vtnet. Ns Ar X Ns Va .tso_maxlen
This tunable sets the TSO burst limit.
The default value is 65535.
.It Va hw.vtnet.rx_process_limit
.It Va hw.vtnet. Ns Ar X Ns Va .rx_process_limit
This tunable sets the number of RX segments processed in one pass.
The default value is 1024.
.It Va hw.vtnet.lro_entry_count
.It Va hw.vtnet. Ns Ar X Ns Va .lro_entry_count
This tunable sets the software LRO entry count.
The default value is 128, the minimum value is 8.
.It Va hw.vtnet.lro_mbufq_depth
.It Va hw.vtnet. Ns Ar X Ns Va .lro_mbufq_depth
This tunable sets the depth of the software LRO mbuf queue.
The default value is 0.
.It Va hw.vtnet.altq_disable
This tunable disables ALTQ support, allowing the use of multiqueue instead.
This option applies to all interfaces.