The following applies to latest "April 2004 stream". Note that Linux distributions containing code based on this stream (like Novell SUSE SLES9 and Red Hat RHEL4) have their own documentation on restrictions. For Linux distributions you may find the webpage on IBM tested Linux environments useful.

"April 2004 stream" - General Restrictions

Kernel (general)

SCLP VT220 driver

Tape driver

Cryptographic Device Driver

Networking

OSA Express driver, QDIO base support, HiperSockets

Networking - Layer 3 mode only

The following applies only when running in Layer 3 mode (i.e. not in Layer 2 mode):

Networking - Layer 2 mode only

The following applies only when running in Layer 2 mode:

Networking - Layer 2 / Layer 3 traffic

The following restriction on Layer 2 and Layer 3 traffic applies only when running in Layer 2 mode on IBM zSeries 990 or 890 or earlier IBM System z9:

The above restriction does not apply when running on recent IBM System z9 - see:

Large MTU sizes may fail due to "order-N allocation failed" problem

Storage

DASD

zfcp

SCSI IPL

s390-tools

s390-tools 1.5.x - general

Contact the IBM team

If you want to contact the Linux on System z IBM team refer to the Contact the Linux on System z IBM team page.