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* [linux-lvm] more info on the hang with 2.6.15-rc5
@ 2005-12-22  5:07 ` Sebastian Kuzminsky
  0 siblings, 0 replies; 16+ messages in thread
From: Sebastian Kuzminsky @ 2005-12-22  5:07 UTC (permalink / raw)
  To: linux-raid, linux-lvm

Now it works, but I dont trust it one bit.

I had been seeing almost immediate, perfectly repeatable hard lockups
in 2.6.15-rc5 and 2.6.15-rc5-mm3, when using sata_mv, RAID, and LVM
together.  Nothing in the syslog or on the console, and the system is
totally unresponsive to the keyboard & network.

My hardware setup is: four Seagate Barracuda 500 GB disks, on a Marvell
MV88SX6081 8-port SATA-II PCI-X controller, on a PCI-X bus (64/66).

The disks work great when accessed directly.  They work great when used
as four PVs for LVM, and when assembled into a 4-disk RAID-6.

But when I make a RAID-6 array out of them, and use the array as a PV,
the system would hang completely, within seconds.  (This is with LVM
2.02.01, libdevicemapper 1.02.02, and dm-driver 4.5.0.)

I turned on all the debugging options in the kernel config hoping to get
some insight, but this "debug" kernel doesnt crash.  It's running fine,
and I'm pounding on it.  A timing problem in the interaction between
LVM and RAID?  Some kind of wierd heisenbug....


I'd be happy to do any debugging tests people suggest.


-- 
Sebastian Kuzminsky

^ permalink raw reply	[flat|nested] 16+ messages in thread

end of thread, other threads:[~2006-01-09 18:05 UTC | newest]

Thread overview: 16+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2005-12-22  5:07 [linux-lvm] more info on the hang with 2.6.15-rc5 Sebastian Kuzminsky
2005-12-22  5:07 ` Sebastian Kuzminsky
2005-12-22 17:13 ` [linux-lvm] " Old Fart
2006-01-08 18:20 ` [linux-lvm] " Bill Davidsen
2006-01-08 18:20   ` Bill Davidsen
2006-01-09  2:33   ` [linux-lvm] " Sebastian Kuzminsky
2006-01-09  2:33     ` Sebastian Kuzminsky
2006-01-09 16:24     ` [linux-lvm] " Matthew Gillen
2006-01-09 16:24       ` Matthew Gillen
2006-01-09 16:35       ` [linux-lvm] " Matt Darcy
2006-01-09 17:27         ` Yeechang Lee
2006-01-09 18:05           ` Sebastian Kuzminsky
2006-01-09 18:05             ` Sebastian Kuzminsky
2006-01-09 17:13       ` Sebastian Kuzminsky
2006-01-09 17:46         ` Mattias Wadenstein
2006-01-09  9:54   ` Matt Darcy

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