Panic in today's current, UFS problem?
scottl at freebsd.org
Mon Aug 2 18:32:01 PDT 2004
Daniel Eriksson wrote:
> I was trying out the new patch from Ville-Pertti Keinonen that might fix my
> interrupt storm problems with SATA when I ran into a panic. The dmesg is
> OS: CURRENT, 2004.08.02.16.00.00
> + VIA/SATA patch from Ville-Pertti Keinonen
> + libdisk patch from Lukas Ertl
> What I did:
> 1. fdisk/label two 250GB discs hooked up to the on-board SATA controller
> (using sysinstall)
> 2. copy ~20GB of data to both discs
Is this step necessary in order to produce the panic?
> 3. successfully run the stress-test mentioned in Ville-Pertti Keinonen's
> mail (above)
Is this step necessary also?
> 4. unmount both discs
> 5. run "atacontrol create RAID0 128 ad20 ad22" (the two SATA discs)
> 6. fdisk/label the striped array (using sysinstall, forcing it to UFS1)
> 7. mount the new partition, and create three empty dirs
> 8. *boom*
How reproducable is this, and does it always panic in the same spot?
There is definitely some sort of buffer corruption going on, and either
it's happening in the buffer/cache layer or it's a bad DMA from the
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