Bug 185533 - dump of LVM snapshot intermittently causes system hang
Summary: dump of LVM snapshot intermittently causes system hang
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: lvm2   
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Version: 4.0
Hardware: i386 Linux
medium
high
Target Milestone: ---
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Assignee: Alasdair Kergon
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2006-03-15 16:24 UTC by James Leafey
Modified: 2007-11-30 22:07 UTC (History)
0 users

Fixed In Version: U3
Doc Type: Bug Fix
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Last Closed: 2006-03-15 16:36:02 UTC
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Description James Leafey 2006-03-15 16:24:54 UTC
Description of problem:
Backup procedure creates an LVM snapshot of a filesystem, then uses dump to
backup the snapshot to a file on another filesystem.  This process
intermittently (perhaps once a week) causes a system-wide hang.

Version-Release number of selected component (if applicable):
    Kernel 2.6.9-22.0.2.EL
    lvm2-2.02.01-1.3.RHEL4

How reproducible:
Intermittent, not easily reproducable.

Steps to Reproduce:
N/A
  
Actual results:


Expected results:


Additional info:

Comment 1 Alasdair Kergon 2006-03-15 16:36:02 UTC
Please try the update 3 kernel - there've been some fixes to the snapshot code.

If you still see problems, reopen and get diagnostics using the sysrq facility
with 't' and 'm' etc.  [see Documentation/sysrq.txt in the kernel source]



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