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Date:	Mon, 12 Mar 2007 09:03:02 +0800
From:	Joe Jin <>
To:	James Bottomley <>
Cc:	Joe Jin <>,,,,,
Subject: Re: [PATCH] [scsi]: Add offline state checking while dispatch a scsi cmd

> This is a bug actually in the megaraid.

Aha, I'll track it.

> And this is a direct command submission path:  it already passed both
> online check gates in this path *after* the device was offlined, so
> adding a third won't fix this. 

Yeah, I have notice that, however, from the logs, the device have offline, 
but why still can send cmd to device? isn't the sequences of printk suspectful?

> single disk, so the I/O was definitely bound for sda?  Secondly, can you
> reproduce with a modern (2.6.20) kernel.  Your trace strongly suggests
> that the device came back online for some reason and then the megaraid
> driver died.

It's hard to update the kernel for the system is a production system, and we
cannot debug it at the box :( 

I dont know if you have notice, the logs come from diskdump, if it caused by

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