Re: 2.6.23.1 - sata_mv (7042) hang with large file operations

[Mark Lord <liml@rtr.ca>]

Morrison, Tom wrote:
..
> ::: Can you give me exact details of how to set up and reproduce this?
> :::  -- Kernel version
>
> 	Linux-2.6.23.1
>
> 	NOTE: I am using ppc (arch/ppc instead of arch/powerpc)
..

Okay.  Is that 32-bit or 64-bit?  How much RAM ?

My PPC machine is not currently set up for Linux,
and has only PCIX (not PCIe) slots, so I'll try this
first on an x86-32 box with PCIe.

If it works for me there, then I may be able to try
a PCIX card in my PPC-32 box later.  The PCIX card
won't have a 7042 of course, so I'll use a 6081 instead.
Those earlier Marvell chips are supposed to be extremely similar.

> :::  -- number/config/model of drives
>
> 	2x250GIG Western Digital - 3 partitions (largest (/dev/sda3
> 	~200Gig - formatted to ext2).
>
> 	7042 PEX on a MPC8548 Board
>
> :::  -- exact command line sequence to cause the failure
>
> 	NFS mount root file system (I am currently rebuild to take away
> 	the NFS file system dependency) - /dev/sda3 is drive in
> question...
>
> 		a) mount /dev/sda3 /mnt/src 
> 		b) cp large_500Meg_file /mnt/src/.
>
> ==========================================================
> ==========================================================
> NOTE: this does NOT fail on a 2.6.11 kernel version!!!!
> 	So I do NOT think it's a hardware problem!
>
> 	It could be a PEX related problem with arch/ppc - I would
> 	expect under heavy pounding with smaller files it would
> 	fail as well - but it does NOT)
> ==========================================================
> ==========================================================
>
> Anything else you need to know?
>
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