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<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>Dear all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'> I have a
problem with creating snapshots on the vanilla Linux2.6.11.5 kernel. I cannot
create more than 3 snapshots on a logical volume when the system is busy
writing to the logical volume. When creating the fourth snapshot the lvm.static
just hangs there, and the process that writes data to the logical volume also
hangs. The system is still running though, and I can access the system through
ssh and do other things, but LVM subsystem is hung. The filesystem on the
logical volume is XFS and the physical volume underneath is a RAID5. The
following lines are from /proc/slabinfo which may be useful:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>dm-snapshot-in 128
140 56 70 1 : tunables
120 60 0 : slabdata
2 2 0<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>dm-snapshot-ex 498095 498108
24 156 1 : tunables 120 60
0 : slabdata 3193 3193 0<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>dm_tio
23549 52206 16 226 1 : tunables
120 60 0 : slabdata 231
231 0<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>dm_io
23548 51754 16 226 1 : tunables
120 60 0 : slabdata 229
229 0<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'> Has anybody
seen similar problem? Any suggestion would be greatly appreciated!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>Regards.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>Charles<o:p></o:p></span></font></p>
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