[Bug 230] New: umount hangs after high disk load

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http://oss.sgi.com/bugzilla/show_bug.cgi?id=230

           Summary: umount hangs after high disk load
           Product: Linux XFS
           Version: Current
          Platform: IA32
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: Medium
         Component: XFS kernel code
        AssignedTo: xfs-master@xxxxxxxxxxx
        ReportedBy: atu@xxxxxxxxxxx


kernel: 2.4.20+xfs(some modern snapshots up to 2003-03-09, from SGI 
FTP)+netfiler+openwall 
build by gcc 3.2.(1-2), XFS in kernel, not in modules. 
 
All linux partitions is XFS: /=hda5(300M), /usr=hda8(7G), /var=hda9(2G), 
/home=hda10(12G). 
swap=hda7(1G). 256M RAM. 
Redhat-like initscripts. 
 
If afer boot run some disk-using program (I use updatedb), and than try to 
reboot or halt, 
shutdown hangs in /etc/rc.d/init.d/halt while first umount loop. 
Using -v as umount, I found, that hang occured while umounting /usr. 
fuser shows no processes, using /usr. 
The same result can be created by:  
  mount /usr -o remount,ro   or   Alt-PrintScreen-u 
Alt-PrintScreen-P shows, shows, that current process in swapper. 
Before hang essenshial disk activity (by LED, approx 10-20s).



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