Bug 222030 - Incorrect accounting information in /proc/vmstat
Incorrect accounting information in /proc/vmstat
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Peter Zijlstra
Brian Brock
Depends On:
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Reported: 2007-01-09 13:06 EST by Peter Zijlstra
Modified: 2014-08-11 01:40 EDT (History)
2 users (show)

See Also:
Fixed In Version: RC
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2007-02-07 21:12:34 EST
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Regression: ---
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Peter Zijlstra 2007-01-09 13:06:50 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.8.1) Gecko/20061027 Firefox/2.0

Description of problem:
A very simple mistake in the introduction of the VM counter infrastructure makes for an inaccurate statistics in /proc/vmstat. A PGSTEAL event is accounted as an PGACTIVATE event thereby skewing both fields.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. put some memory pressure on a box
2. grep steal /proc/vmstat
3. notice that pgsteal_* are all zero while kswapd_steal != 0

Actual Results:
[peter@taijtu ~]$ grep steal /proc/vmstat
pgsteal_dma 0
pgsteal_dma32 0
pgsteal_normal 0
pginodesteal 0
kswapd_steal 193507
kswapd_inodesteal 30154

Expected Results:
Sum pgsteal_* > kswapd_steal

Additional info:
Comment 1 Peter Zijlstra 2007-01-09 13:09:16 EST
Posted patch

Subject: [PATCH RHEL5] Buglet in vmscan.c
Date: Mon, 08 Jan 2007 16:46:07 +0100
Comment 3 RHEL Product and Program Management 2007-01-11 09:01:15 EST
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
Comment 4 Jay Turner 2007-01-11 14:47:49 EST
QE ack for RHEL5.
Comment 5 Don Zickus 2007-01-12 15:15:02 EST
in 2.6.18-1.3014.el5
Comment 6 RHEL Product and Program Management 2007-02-07 21:12:34 EST
A package has been built which should help the problem described in 
this bug report. This report is therefore being closed with a resolution 
of CURRENTRELEASE. You may reopen this bug report if the solution does 
not work for you.

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