2005-06-03 kernel 2.6.5 bug fix patch 21 ("April 2004")

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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)

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.