Red Hat LINUX VIRTUAL SERVER - FOR ENTERPRISE LINUX 5.2 REV 05-2008 Instrukcja Użytkownika Pobierz pdf (Strona 19)

System z kernel features - Networking

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Support two OSA ports per CHPID -

Four-port exploitation (kernel 2.6.25)

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Exploit next OSA adapter generation which offers two ports within one CHPID

The additional port number 1 can be specified with the qeth sysfs-attribute

"portno".

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This support is available only for OSA-Express3 GbE SX and LX on z10,

running Linux on System z in an LPAR or as a VM guest (PTF for z/VM APAR

VM64277 required).

•

QETH componentization (kernel 2.6.25)

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The qeth driver module is split into a core module and layer2-/layer3-specific

modules. The default operation mode for OSA-devices is changed to layer2; for

HiperSockets devices the layer3 default-mode is kept.

•

For layer3 mode devices the existence of (possibly faked) ethernet-headers is

guaranteed to enable smooth integration of qeth devices into Linux.

•

SKB scatter-gather support for large incoming messages

•

This avoids allocating big chunks of consecutive memory and should increase

networking throughput in some situations for large incoming packets.

10.2

5.2

10.2

5.2

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Red Hat LINUX VIRTUAL SERVER - FOR ENTERPRISE LINUX 5.2 REV 05-2008 Instrukcja Użytkownika Strona 19