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Message-Id: <200502080856.j188u4sh000755@polymer3.scphys.kyoto-u.ac.jp>
Date: Tue, 8 Feb 2005 17:56:04 +0900 (JST)
From: Tsurutani Naoki <turutani@scphys.kyoto-u.ac.jp>
Reply-To: Tsurutani Naoki <turutani@scphys.kyoto-u.ac.jp>
To: FreeBSD-gnats-submit@freebsd.org
Cc: turutani@polymer3.scphys.kyoto-u.ac.jp
Subject: meminfo in linprocfs returns bad value about swap.
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>Number:         77253
>Category:       kern
>Synopsis:       [linux] meminfo in linprocfs returns bad value about swap.
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-emulation
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Feb 08 09:00:28 GMT 2005
>Closed-Date:    Sun Jan 15 07:03:33 GMT 2006
>Last-Modified:  Sun Jan 15 07:03:33 GMT 2006
>Originator:     Tsurutani Naoki
>Release:        FreeBSD 4.10-STABLE i386
>Organization:
>Environment:
System: FreeBSD polymer3.scphys.kyoto-u.ac.jp 4.10-STABLE FreeBSD 4.10-STABLE #15: Sat Aug 7 13:16:19 JST 2004 root@polymer3.scphys.kyoto-u.ac.jp:/usr/local/work/usr/obj/usr/src/sys/POLYMER i386


	
>Description:
"cat /compat/linux/proc/meminfo" returns bad value about swap size in use. On host with next swap partision:
	% swapinfo
	Device          1K-blocks     Used    Avail Capacity  Type
	/dev/ad0s1b        262016        0   262016     0%    Interleaved
	/dev/rad1s1b      1048448        0  1048448     0%    Interleaved
	Total             1310464        0  1310464     0%

	"cat /compat/linux/proc/meminfo" shows next values:
	% cat /compat/linux/proc/meminfo
	        total:    used:    free:  shared: buffers:  cached:
	Mem:  532656128 66535424 466120704 14569472 0 25350144
	Swap: 1073741824 18446744073441378304 1341915136
	MemTotal:    520172 kB
	MemFree:     455196 kB
	MemShared:    14228 kB
	Buffers:          0 kB
	Cached:       24756 kB
	SwapTotal:  1048576 kB
	SwapFree:   1310464 kB

	The 2nd column in "Swap:" line is incorrect, and this is due to
	bad "total swap size" of the 1st column in that line.
	I guess this value is the size of 2nd swap device. But the unused swap
	size shows correct size, so the difference of 2 values becomes
	negative value and shows large long long integer value.

	
>How-To-Repeat:
	always when 2 swap device is specified.
	only 1 device does not make such result.
	
>Fix:
I don't know.
	"swapblist" in /usr/src/sys/i386/linux/linprocfs/linprocfs_misc.c might be suspicious.... 

	


>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->freebsd-emulation 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Sat Jul 23 02:16:08 GMT 2005 
Responsible-Changed-Why:  
Over to maintainer(s). 

http://www.freebsd.org/cgi/query-pr.cgi?pr=77253 
Responsible-Changed-From-To: freebsd-emulation->emulation 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Mon Jul 25 20:20:59 GMT 2005 
Responsible-Changed-Why:  
Canonicalize assignment. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=77253 
State-Changed-From-To: open->feedback 
State-Changed-By: netchild 
State-Changed-When: Thu Dec 29 16:15:04 UTC 2005 
State-Changed-Why:  
Is this still a problem with a recent FreeBSD? 

http://www.freebsd.org/cgi/query-pr.cgi?pr=77253 
State-Changed-From-To: feedback->open 
State-Changed-By: netchild 
State-Changed-When: Sat Jan 14 14:26:04 UTC 2006 
State-Changed-Why:  
Still a problem on 5-stable: 
---snip--- 
Yes, it is still bogus... 

polymer3 % uname -a 
FreeBSD polymer3.scphys.kyoto-u.ac.jp 5.4-STABLE FreeBSD 5.4-STABLE #11: 
Mon Dec 26 11:23:23 JST 2005     turutani@polymer3.scphys.kyotou.ac.jp:/usr/obj/usr/src/sys/POLYMER  i386 

polymer3 % cat /compat/linux/proc/meminfo 
total:    used:    free:  shared: buffers:  cached: 
Mem:  527863808 90378240 437485568 16003072 0 25706496 
Swap: 18446744071562067968 229376 18446744071561838592 
MemTotal:    515492 kB 
MemFree:     427232 kB 
MemShared:    15628 kB 
Buffers:          0 kB 
Cached:       25104 kB 
SwapTotal:18014398507384832 kB 
SwapFree: 18014398507384608 kB 

polymer3 % swapinfo 
Device          1K-blocks     Used    Avail Capacity 
/dev/ad0s1b       1048576       88  1048488     0% 
/dev/ad1s1b       1048576      136  1048440     0% 
Total             2097152      224  2096928     0% 

polymer3 % cat /var/run/dmesg.boot | grep memory 
real memory  = 536805376 (511 MB) 
avail memory = 515629056 (491 MB) 
---snip--- 

http://www.freebsd.org/cgi/query-pr.cgi?pr=77253 
State-Changed-From-To: open->analyzed 
State-Changed-By: linimon 
State-Changed-When: Sat Jan 14 18:20:04 UTC 2006 
State-Changed-Why:  
ISTM 'analyzed' is a better state for this. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=77253 
State-Changed-From-To: analyzed->closed 
State-Changed-By: linimon 
State-Changed-When: Sun Jan 15 07:02:42 UTC 2006 
State-Changed-Why:  
Submitter notes that the latest cvsup has fixed the problem. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=77253 
>Unformatted:
