Patch-ID# 103328-04
Keywords: SIGSTOP multi-threaded proc hang procfs deadlock prioctl sched 
Synopsis: SunOS 5.5: /kernel/fs/procfs fix
Date: Jan/26/98

Solaris Release: 2.5

SunOS release: 5.5

Unbundled Product: 

Unbundled Release: 

Topic:  SunOS 5.5: /kernel/fs/procfs fix

	NOTE  : Due to bugfix 4057818 (panic due to procfs access of non-
		existent mapping), we recommend installing 105316-01 
		(usr/bin/gcore patch). 

BugId's fixed with this patch: 1232838 1240706 1260593 1261934 4057818 

Changes incorporated in this version: 4057818

Relevant Architectures: sparc

Patches accumulated and obsoleted by this patch:  

Patches which conflict with this patch: 

Patches required with this patch: 103093-17 (or higher revs)

Obsoleted by: 

Files included with this patch:

/kernel/fs/procfs

Problem Description:

4057818 panic due to procfs access of non-existent mapping

(from 103328-03)

1260593 /usr/ucb/ps hang in rw_enter while other thread wedged in page_lock
1261934 /proc must disallow access to pages not in the address space map

(from 103328-02)

1232838 Backport 1229099: sched: sched()/prioctl()/clock() deadlock during heavy swappi

(from 103328-01)

1240706 Sending SIGSTOP to a multi-threaded process via /proc hangs the system


Patch Installation Instructions: 
-------------------------------- 
Refer to the Install.info file within the patch for instructions on
using the generic 'installpatch' and 'backoutpatch' scripts provided
with each patch.  Any other special or non-generic installation
instructions should be described below.


Special Install Instructions: 
-----------------------------
	NOTE  : Due to bugfix 4057818 (panic due to procfs access of non-
		existent mapping), we recommend installing 105316-01 
		(usr/bin/gcore patch).