Kernel 2.4 based: June 2003 stream

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linux-2.4.21-s390-02-june2003.tar.gz / MD5 ... accumulated patch, recommended (2003-06-30)

linux-2.4.21-s390-02-june2003-patches.tar.gz / MD5 ... per-problem-patches, recommended (2003-06-30)

These patches contain the following linux kernel bug fixes:

Description:

multicast or broadcast flood ping hang on HiperSockets

Symptom:

multicast or broadcast flood ping hang on HiperSockets

Problem:

delayed freeing of skbs

Solution:

poll for multicast queue earlier to not have skb hanging around for a long time

Problem-ID:

n/a

Description:

starting a LCS network device with specific module parameters causes an address exception

Symptom:

1. start LCS module with parameter model_no=1 and rel_adapter_no=1
2. starting the LCS network device causes an address exception

Problem:

init_waitqueue_head was not called for a lanstat_wait in kernel version > 2.3.0

Solution:

Properly initialize lanstat_wait

Problem-ID:

n/a

Description:

Wrong data direction of START STOP UNIT command.

Symptom:

"RSP_CODE_FIELD_INVALID" messages and unable to access device.

Problem:

When sending a START STOP UNIT command to a device the SCSI stack sets the data direction to SCSI_DATA_READ. Because of this the zfcp device driver creates an FCP_CMND IU where RDDATA is set to 1.
Some hardware will recognize this invalid setting and respond to this with an FCP_RSP IU where the RSP_CODE field is set to "FCP_CMND Fields Invalid".

Solution:

Set data direction to SCSI_DATA_NONE.

Problem-ID:

n/a

Description:

Deadlock in memory management code.

Symptom:

Mapping and accessing memory on a 64 bit zLinux system that requires a full segment table can lead to a deadlock if the system is low on memory.

Problem:

The extension of a half-sized pmd (8K) to a full-sized pmd (16K) requires the allocation of 4 consequitive pages. If the system starts swapping to allocate these 4 pages and touches the page table the reallocation is done for it deadlocks on the page table lock.

Solution:

Release the page table lock in pgd_populate before calling __get_free_pages.

Problem-ID:

n/a

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)


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