Re: [OOPS] 2.6.21-rc6-git5 in cfq_dispatch_insert

[Brad Campbell <brad@wasp.net.au>]

Jens Axboe wrote:

> I had something similar for generic_unplug_request() as well, but didn't
> see/hear any reports of it being tried out. Here's a complete debugging
> patch for this and other potential dangers.
> 

I had a clean 2.6.21-rc7 that I forgot to change the default sched on take down my main server last 
night. Another oops of the same variety. Unfortunately only a digital photo to go by though.

I've removed Neil's patch, applied yours and fired it up on my 4 drive test box (the one that was 
causing the trouble before). I've finally scrounged another machine for a serial logger and I'll 
beat it until it breaks. Perhaps if I can get this to reliably trigger again we can track it down.

Brad
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