Bug 252033

Summary:	separate mapped file and mapped anonymous pages in show_mem()
Product:	Red Hat Enterprise Linux 5	Reporter:	Linda Wang <lwang>
Component:	kernel	Assignee:	Larry Woodman <lwoodman>
Status:	CLOSED ERRATA	QA Contact:	Martin Jenner <mjenner>
Severity:	low	Docs Contact:
Priority:	low
Version:	5.0	CC:	dzickus, eteo, riel
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	RHBA-2007-0959	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-11-07 19:59:11 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Linda Wang 2007-08-13 20:32:57 UTC

Description of problem:

The attached patch separates the "mapped" pages count into "mapped-file" and
"mapped-anon"
page counts in the show_mem()  output.  Without this change it is difficult to
debug memory
consumption problems with AltSysrq-M outputs. 

Need it to debug bug 250155

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


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

Comment 1 Linda Wang 2007-08-13 20:34:15 UTC

patch below posted on 7/30/07:

--- linux-2.6.18.noarch/mm/page_alloc.c.orig
+++ linux-2.6.18.noarch/mm/page_alloc.c
@@ -1289,7 +1289,7 @@ void show_free_areas(void)
 		K(nr_free_highpages()));
 
 	printk("Active:%lu inactive:%lu dirty:%lu writeback:%lu "
-		"unstable:%lu free:%u slab:%lu mapped:%lu pagetables:%lu\n",
+		"unstable:%lu free:%u slab:%lu mapped-file:%lu mapped-anon:%lu pagetables:%lu\n",
 		active,
 		inactive,
 		global_page_state(NR_FILE_DIRTY),
@@ -1298,6 +1298,7 @@ void show_free_areas(void)
 		nr_free_pages(),
 		global_page_state(NR_SLAB),
 		global_page_state(NR_FILE_MAPPED),
+		global_page_state(NR_ANON_PAGES),
 		global_page_state(NR_PAGETABLE));
 
 	for_each_zone(zone) {

Comment 4 Don Zickus 2007-08-21 18:36:31 UTC

in 2.6.18-42.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5

Comment 7 errata-xmlrpc 2007-11-07 19:59:11 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2007-0959.html