If you download any software from this web site please be aware of the Warranty Disclaimer and Limitation of Liabilities.

Kernel downloads for the "Development stream"

Download Description
upstream kernel 2.6.37 kernel 2.6.37 - upstream with feature descriptions.
linux-2.6.37-s390-message-catalog.tar.gz / MD5 "Development Stream" kernel 2.6.37 - message-catalog (optional)

2011-01-27: kernel 2.6.37 - upstream (feature description)

To download the linux-2.6.37.tar.gz visit: http://www.kernel.org/pub/linux/kernel/v2.6

Since kernel 2.6.35, no more kernel kerntypes-patches (required for work with lcrash, from lkcdutils/LKCD) are provided: Use crash instead of lcrash.

The upstream kernel 2.6.37 contains the following functionality developed by the Linux on System z development team:

Summary:
dasd: API to query DASD reservation status
Description:
The dasd device driver can now determine the reservation status of a given DASD in relation to the current Linux instance.

The tunedasd tool in s390-tools 1.12.0 (or later) displays the DASD reservation status.


Summary:
kernel: CPU node affinity support for z196
Description:
Compared to z10, the z196 has another (additional) level of the CPU cache hierarchy.

With this feature, the kernel node affinity support introduced for z10 is enhanced to identify the z196 CPU topology. This information can be used to optimize the Linux scheduler which bases its decisions on which process gets scheduled to which CPU on the CPU topology.

This support is available only on z196, when running Linux on System z in an LPAR.


Summary:
kernel: Export z196 performance indicator bytes
Description:
For z196, export the contents of Capacity-Change Reason (CCR) and Capacity-Adjustment Indication (CAI) of SYSIB 1.1.1 to the output of /proc/sysinfo. This can be useful for problem determination by IBM support.

This support is available only on z196, when running Linux on System z in an LPAR.


Summary:
qdio, qeth: NAPI support
Description:
Adapt qdio and qeth to the standard Linux kernel network interface NAPI ("New API"). Using NAPI, qeth can can now disable interrupts to reduce CPU load under high network traffic.

Summary:
qeth: Support VLAN assisted null tagging
Description:
qeth now handles tagged frames with VLAN-ID 0, with or without priority information in the tag. Priority tags as specified by IEEE Standard 802.1Q are supported for both layer2 and layer3.

This enables qeth to receive priority-tagged frames on a base interface (for example from z/OS) without configuring an additional VLAN interface.


Summary:
zfcp: Automated LUN scanning for NPIV only
Description:
For FCP subchannels running in NPIV mode, allow the Linux SCSI midlayer to scan and automatically attach SCSI devices that are available for the NPIV WWPN, which makes the behavior of zfcp in NPIV mode similar to that of all other Linux SCSI drivers.

The manual configuration of LUNs in zfcp is now only required for non-NPIV FCP subchannels. For compatibility reasons, the zfcp sysfs configuration interface stays the same for non-NPIV LUN configurations.

2011-01-27: "Development Stream" kernel 2.6.37 message catalog (feature - optional patch)

linux-2.6.37-s390-message-catalog.tar.gz / MD5 ... recommended (2011-01-27)

This patch contains:

Summary:
Kernel message catalog.
Description:
Add support for automatic message tags to the printk macro families dev_xyz and pr_xyz. The message tag consists of a component name and a 24 bit hash of the message text. For each message that is documented in the included kernel message catalog a man page can be created with a script (which is included in the patch). The generated man pages contain explanatory text that is intended to help understand the messages.

Note that only s390 specific messages are prepared appropriately and included in the generated message catalog.

This patch is optional as it is very unlikely to be accepted in upstream kernel, but is recommended for all distributions which are built based on the 'Development stream'.

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.