netbsd-bugs: kern/34841: swapsys locks too much

Subject: kern/34841: swapsys locks too much
To: None <kern-bug-people@netbsd.org, gnats-admin@netbsd.org,>
From: None <christos@netbsd.org>
List: netbsd-bugs
Date: 10/17/2006 17:10:01

>Number:         34841
>Category:       kern
>Synopsis:       pstat -s blocks while swapctl -d is running
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Oct 17 17:10:00 +0000 2006
>Originator:     Christos Zoulas
>Release:        NetBSD 4.99.1
>Organization:
	Losers Intl.
>Environment:
System: NetBSD rebar.astron.com 4.99.1 NetBSD 4.99.1 (ASTRON) #2: Fri Sep 8 15:10:53 EDT 2006 christos@rebar.astron.com:/usr/src/sys/arch/i386/compile/ASTRON i386
Architecture: i386
Machine: i386
>Description:

>How-To-Repeat:
	On a machine that has swap in use
	dd if=/dev/zero of=swap # enough for the swap space to fit.
	swapctl -a swap
	swapctl -d /dev/xxxx &
	pstat -s	# hangs while swapctl is moving the data
	top		# hangs

	Activity resumes once swapctl is done.
>Fix: