Kernel 2.4 based: June 2003 stream

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linux-2.4.21-s390-12-june2003.tar.gz / MD5 ... accumulated patch, recommended (2004-03-30)

linux-2.4.21-s390-12-june2003-patches.tar.gz / MD5 ... per-problem-patches, recommended (2004-03-30)

These patches contain the following linux kernel bug fixes:

Description:

qdio, qeth: improved retry behavior on busy conditions

Symptom:

Guest LAN HiperSockets slowdown

Problem:

siga cc=2 with busy bit set was not handled appropriately

Solution:

retry siga in tasklet, when cc=2+busy-bit

Problem-ID:

6676

Description:

xip2: implemented readlink and followlink for classic VFS symbolic links

Symptom:

Message "readpage was called" is displayed in syslog

Problem:

no private implementation for follow_link and read_link for classic VFS (slow) symbolic links was present. The generic namei implementations were used instead which use readpage.

Solution:

Implement private read_link and follow_link functions for classic VFS (slow) symbolic links

Problem-ID:

7082

Description:

z90crypt: certain devices might be detected incorrectly

Symptom:

devices might be detected incorrectly

Problem:

missing case in a switch statement

Solution:

add necessary entry to enum and case to switch statement

Problem-ID:

6970

Description:

z90crypt: possible failure on PCICC with very large request, unnecessary messages in syslog

Symptom:

certain requests fail, extraneous messages in syslog

Problem:

incorrect value for maximum size of reply buffer, unneeded printk()s

Solution:

1. update #define for maximum size of PCICC reply buffer
2. make certain messages debugging-only
3. removed impossible if condition

Problem-ID:

7020

Description:

zfcp: watchdog for stalled FCP channel

Symptom:

SCSI I/O stall

Problem:

The zfcp driver keeps SCSI commands in a retry loop if the FCP channel's queues are full - under the assumption that this is a transient condition. In case of a grid-locked FCP channel commands juggled within that retry loop never finished - hindering the SCSI stacks recovery to reset the SCSI adapter, which would help to overcome this stall.

Solution:

Use a timestamp for each SCSI command to watch its retries and fail a SCSI command if a certain timeout has been exceeded (2 minutes).

Problem-ID:

7092

Description:

zfcp_hbaapi: IOCTRL broken if SCSI_SENSE_BUFFERSIZE is changed

Symptom:

I/O controls for REPORT LUNS, INQUIRY, READ CAPACITY do not work if SCSI_SENSE_BUFFERSIZE is changed (only) in kernel sources

Problem:

structs in I/O controls depend on kernel macro

Solution:

avoid usage of SCSI_SENSE_BUFFERSIZE in struct definitions, use separate macro instead considering max possible sense data size as defined in SPC-2

Problem-ID:

7035

Note:

Together with this fix the new library package lib-zfcp-hbaapi-1.1.tar.gz should be installed. (See zfcp HBA API library)

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)

Note: If On-demand timer is required, apply as last patch:
+ linux-2.4.21-s390-timer-03-june2003.diff (IBM)

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