Patch-ID# 109455-05

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Keywords: fifofs fifo_fastturnoff fifo_poll stream fifonode
Synopsis: SunOS 5.8_x86: /kernel/fs/fifofs patch
Date: Jul/26/2006


Install Requirements: See Special Install Instructions                      
                      Reboot after installation, an alternative may be in Special Install Instructions                      
                      
Solaris Release: 8_x86

SunOS Release: 5.8_x86

Unbundled Product: 

Unbundled Release: 

Xref: This patch available for SPARC as patch 109454

Topic: SunOS 5.8_x86: /kernel/fs/fifofs patch

Relevant Architectures: i386

BugId's fixed with this patch: 4302216 4460375 4482621 5036875 5098322 6376632 6396390

Changes incorporated in this version: 6376632 6396390

Patches accumulated and obsoleted by this patch: 

Patches which conflict with this patch: 

Patches required with this patch: 

Obsoleted by: 

Files included with this patch: 

/kernel/fs/fifofs
/kernel/strmod/connld
/usr/include/sys/fs/fifonode.h
/usr/lib/adb/fifonode

Problem Description:

6376632 writer and reader of a pipe can race and leave writer process hung.
6396390 FIFOPOLLRBAND flag should not be set to the same value as FIFOISOPEN
 
(from 109455-04)
 
5036875 pipe performance can be significantly improved
5098322 pipe performance with small buffers regressed by 5036875
 
(from 109455-03)
 
4482621 fstat intermittently returns err#79 EOVERFLOW when run on 64-bit OS
 
(from 109455-02)
 
4460375 poll sometimes returns 0 when data should be on queue.
 
(from 109455-01)
 
4302216 Sleeping in poll when data ready on stream read queue

Patch Installation Instructions:
--------------------------------
For Solaris 2.0-2.6 releases, refer to the Install.info file and/or
the README within the patch for instructions on using the generic
'installpatch' and 'backoutpatch' scripts provided with each patch.
 
For Solaris 7-10 releases, refer to the man pages for instructions
on using 'patchadd' and 'patchrm' scripts provided with Solaris.
Any other special or non-generic installation instructions should be
described below as special instructions.  The following example
installs a patch to a standalone machine:
 
       example# patchadd /var/spool/patch/104945-02
 
The following example removes a patch from a standalone system:
 
       example# patchrm 104945-02
 
For additional examples please see the appropriate man pages.

Special Install Instructions:
-----------------------------
 
NOTE 1:  Reboot the system after patch installation.
 
NOTE 2:  For a complete solution to bugid 4460375 (poll sometimes returns 0 
         when data should be on queue), please install the following patch:
 
         108529-24 (or greater)  kernel patch

README -- Last modified date:  Wednesday, July 26, 2006

