Kernel 2.6 based: April 2004 stream

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linux-2.6.5-s390-21-april2004.tar.gz / MD5 ... accumulated patch, recommended (2005-06-03)

linux-2.6.5-s390-21-april2004-patches.tar.gz / MD5 ... per-problem-patches, recommended (2005-06-03)

These patches contain the following linux kernel bug fixes:

Description:

kernel: Memory detection problems with 32GB or more.

Symptom:

Kernel seems to hang if IPL'ed in an environment with 32GB or more memory.

Problem:

The memory size is contained in a structure, which the kernel accesses with the LH instruction. Since this instruction performs sign extension this is a problem as soon as 32GB or more memory is reported. In this case this will result in a very large value loaded into a register which will be used in a loop, resulting in a very long delay until the kernel finally continues operation. If 64GB or more memory is defined, the kernel reads the memory size from a wrong location, because of a wrong offset.

Solution:

Use different instruction that does not perform sign extension and use correct offset.

Problem-ID:

15858

Description:

zfcp: Do port re-open only if test link fails.

Symptom:

Remote port is re-opened by zfcp module after an FC-2 problem has being reported by Emulex adapter even if link is up.

Problem:

In case Emulex adapter reports an FC-2 problem zfcp module re-opens a remote port without having checked the link status.

Solution:

Re-open remote port only if link is down.

Problem-ID:

16146

Description:

zfcp: Inproper handling of failed nameserver requests.

Symptom:

Ports are marked as failed if nameserver request was not successfully sent.

Problem:

ZFCP_STATUS_PORT_INVALID_WWPN is set if nameserver request could not be sent.

Solution:

Set ZFCP_STATUS_PORT_INVALID_WWPN only if response payload for nameserver request indicates a reject of the request.

Problem-ID:

16120

Description:

zfcp: Problem in zfcp_fsf_send_els_handler() when D_ID assignment changes.

Symptom:

False port is re-opened if ADISC LS command failed on another port.

Problem:

D_ID assignment may be changed after ADISC command has been sent and before ADISC response comes back.

Solution:

Save a pointer to zfcp_port structure as well as port's D_ID when sending an ADISC.

Problem-ID:

16114

Description:

zfcp: Bug during adapter shutdown.

Symptom:

Message "zfcp: bug: There are still -1 FSF requests pending on adapter 0.0.c500 after cleanup." occurred.

Problem:

When zfcp cleans up its fsf_req list, it is possible that the completion for a member of that list is executed concurrently. This leads to the bug message and finally to memory corruption, because memory is freed twice.

Solution:

Serialize access to fsf_req list between zfcp_fsf_req_dismiss_all and zfcp_qdio_reqid_check and delete a fsf-request from the list if its completion is triggered.

Problem-ID:

15658

Everybody should apply this patch.

To create the complete linux kernel sources, the following patches need to be applied in sequence:

linux-2.6.5.tar.gz (see www.kernel.org/pub/linux/kernel/v2.6)
+ linux-2.6.5-s390-base-april2004.diff (IBM)
+ linux-2.6.5-s390-01-april2004.diff (IBM)
+ xipfs612 (see linuxvm.org/patches/index.html)
+ xipfs622 (see linuxvm.org/patches/index.html)
+ linux-2.6.5-s390-02-april2004.diff (IBM)
+ linux-2.6.5-s390-03-april2004.diff (IBM)
+ single threaded workqueue patch (see marc.theaimsgroup.com/?l=bk-commits-head&m=108305028322900&q=raw)
+ linux-2.6.5-s390-04-april2004.diff (IBM)
+ linux-2.6.5-s390-05-april2004.diff (IBM)
+ linux-2.6.5-s390-06-april2004.diff (IBM)
+ linux-2.6.5-s390-07-april2004.diff (IBM)
+ linux-2.6.5-s390-08-april2004.diff (IBM)
+ linux-2.6.5-s390-09-april2004.diff (IBM)
+ linux-2.6.5-s390-10-april2004.diff (IBM)
+ linux-2.6.5-s390-11-april2004.diff (IBM)
+ linux-2.6.5-s390-12-april2004.diff (IBM)
+ linux-2.6.5-s390-13-april2004.diff (IBM)
+ linux-2.6.5-s390-14-april2004.diff (IBM)
+ linux-2.6.5-s390-15-april2004.diff (IBM)
+ linux-2.6.5-s390-16-april2004.diff (IBM)
+ linux-2.6.5-s390-17-april2004.diff (IBM)
+ linux-2.6.5-s390-18-april2004.diff (IBM)
+ linux-2.6.5-s390-19-april2004.diff (IBM)
+ linux-2.6.5-s390-20-april2004.diff (IBM)
+ linux-2.6.5-s390-21-april2004.diff (IBM)

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