Bug 17070

Summary:	quota related system hang
Product:	[Retired] Red Hat Linux	Reporter:	Juan Manuel Calvo <jmc>
Component:	kernel	Assignee:	Michael K. Johnson <johnsonm>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.2
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2002-12-15 01:25:41 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 Juan Manuel Calvo 2000-08-29 12:50:30 UTC

I have found this problem with all  rh6.x versions, I don't know if it is
applicable to other
versions. My system has about 3000 active accounts.

The problem is:

The variable displayed with     

$ cat  /proc/sys/fs/dquot-nr

Increments until system hangs when this value is equal to
/proc/sys/fs/dquot-max (default 1024). A temporary workaround is increment
this value.

Rebooting the system dquot-nr returns to 0 and starts incrementing again.

Comment 1 Philip Rowlands 2000-08-30 18:08:19 UTC

This from the kernel documentation:

dquot-nr and dquot-max
   The file dquot-max shows the maximum number of cached disk quota
   entries.

   The file dquot-nr shows the number of allocated disk quota
   entries and the number of free disk quota entries.

   If the number of free cached disk quotas is very low and you have
   a large number of simultaneous system users, you might want
   to raise the limit.


Of course, it shouldn't hang when this resource gets low, but you might find
that:
echo 4096 > /proc/sys/fs/dquot-max
in /etc/rc.d/rc.local will solve your problems.

Comment 2 Preston Brown 2001-02-01 23:38:10 UTC

this is a kernel issue.  Is it still present in RH7 (2.2.16 and later) kernels?