Kernel patches

2005-06-23 kernel 2.4.21 bug fix patch 27 ("June 2003")

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linux-2.4.21-s390-27-june2003.tar.gz / MD5 ... accumulated patch, recommended (2005-06-23)

linux-2.4.21-s390-27-june2003-patches.tar.gz / MD5 ... per-problem-patches, recommended (2005-06-23)

These patches contain the following linux kernel bug fixes:

Description:
kernel: SIGP external call order code performance.
Symptom:
Processes that communicate via semaphore operations are running slowly if executed in an LPAR environment with dedicated CPUs.
Problem:
The kernel uses the SIGP external call order code to signal other CPUs. When running with dedicated CPUs external calls do not get delivered immediately but within a fixed polling intervall. This can lead to delays where the system appears to do nothing.
Solution:
Use SIGP emergency call which gets delivered immediately.
Problem-ID:
14397
Description:
lcs: Failing 'ifconfig up' because of race in lcs_probe().
Symptom:
'ifconfig up' fails with 'Device not found'. This can happen, when a hotplug script, which configures the network device, is executed as a result of the register_netdev() function.
Problem:
register_netdev() is called before all net_device structure members have been completely initialized.
Solution:
Initialize the net_device members first.
Problem-ID:
16260

Everybody should apply this patch.

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

linux-2.4.21.tar.gz (see www.kernel.org)
+ linux-2.4.21-s390-june2003.diff (IBM)
+ linux-2.4.21-s390-01-june2003.diff (IBM)
+ linux-2.4.21-s390-02-june2003.diff (IBM)
+ linux-2.4.21-s390-03-june2003.diff (IBM)
+ linux-2.4.21-s390-04-june2003.diff (IBM)
+ linux-2.4.21-s390-05-june2003.diff (IBM)
+ linux-2.4.21-s390-06-june2003.diff (IBM)
+ linux-2.4.21-s390-07-june2003.diff (IBM)
+ linux-2.4.21-s390-08-june2003.diff (IBM)
+ linux-2.4.21-s390-08-june2003.diff (IBM)
+ linux-2.4.21-s390-09-june2003.diff (IBM)
+ linux-2.4.21-s390-10-june2003.diff (IBM)
+ xip2fs1 (see linuxvm.org/patches/index.html)
+ xip2fs2 (see linuxvm.org/patches/index.html)
+ linux-2.4.21-s390-11-june2003.diff (IBM)
+ linux-2.4.21-s390-12-june2003.diff (IBM)
+ linux-2.4.21-s390-13-june2003.diff (IBM)
+ linux-2.4.21-s390-14-june2003.diff (IBM)
+ linux-2.4.21-s390-15-june2003.diff (IBM)
+ linux-2.4.21-s390-16-june2003.diff (IBM)
+ linux-2.4.21-s390-17-june2003.diff (IBM)
+ linux-2.4.21-s390-18-fixed-june2003.diff (IBM)
+ linux-2.4.21-s390-19-june2003.diff (IBM)
+ linux-2.4.21-s390-20-june2003.diff (IBM)
+ linux-2.4.21-s390-21-june2003.diff (IBM)
+ linux-2.4.21-s390-22-june2003.diff (IBM)
+ linux-2.4.21-s390-23-june2003.diff (IBM)
+ linux-2.4.21-s390-24-june2003.diff (IBM)
+ linux-2.4.21-s390-25-june2003.diff (IBM)
+ linux-2.4.21-s390-26-june2003.diff (IBM)
+ linux-2.4.21-s390-27-june2003.diff (IBM)

Note: If On-demand timer is required, apply as last patch:
+ linux-2.4.21-s390-timer-04-june2003.diff (IBM)

Note: If you apply the above patches, you need as a minimum the 2005-02-14 version of the tape_3590 OCO module "tape3590-2.4.21-s390(x)-03-june2003.tar.gz".

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.