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:	update #define for maximum size of PCICC reply buffer make certain messages debugging-only 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)