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Bug 17070

Summary: quota related system hang
Product: [Retired] Red Hat Linux Reporter: Juan Manuel Calvo <jmc>
Component: kernelAssignee: 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?