kata-containers/s390-tools
1
0
Fork 0
mirror of https://github.com/ibm-s390-linux/s390-tools.git synced 2026-08-05 02:14:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

hsci: Automatically set appropriate MTU for HSCI

Browse Source 
At present, the hsci tool creates HiperSockets Converged Interface
(HSCI) with MTU of 1500 bytes regardless of the values of MTU for the
external and HiperSockets interface from which it is formed. This can
degrade performance or worse, affect network connectivity through the
converged interface.

Update the tool to automatically set MTU of HSCI as the lower of the
MTU values of external and HiperSockets interface.

Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Aswin Karuvally <aswin@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Aswin Karuvally
2026-02-01 18:39:38 +05:30
committed by Jan Höppner
parent 5b909a40cb
commit 11f2ccb957
1 changed files with 7 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
hsci/hsci
View File

@@ -365,6 +365,13 @@ function add_hsci {
fi
fi
#### Set MTU for the veth pair
ndev_mtu="$(cat /sys/class/net/${ndev}/mtu)"
hsdev_mtu="$(cat /sys/class/net/${hsdev}/mtu)"
hsci_mtu=$(( ndev_mtu < hsdev_mtu ? ndev_mtu : hsdev_mtu ))
ip link set dev $hscibp mtu $hsci_mtu
ip link set dev $hsci mtu $hsci_mtu
#### Set veth pair to UP
ip link set dev $hscibp up >/dev/null 2>&1
if [ $? -ne 0 ]; then