Re: [PATCH] as i/o hang with aacraid driver 2.6.0-test1

[Nick Piggin <piggin@cyberone.com.au>]

Jens Axboe wrote:

>On Thu, Jul 17 2003, Nick Piggin wrote:
>
>>
>>Jens Axboe wrote:
>>
>>
>>>On Thu, Jul 17 2003, Andrew Morton wrote:
>>>
>>>
>>>>So this is what I ended up with.  Could we please have confirmation that 
>>>>it
>>>>fixes the aacraid hang?
>>>>
>>>>
>>>It doesn't, it's just a pre-requisite to fixing the bug :-)
>>>
>>>Nick should chime in with how we wants it to be handled from
>>>blk_requeue_request(), he needs to decrease dispatched from there. We
>>>could always add some hook for it of course, but...
>>>
>>>
>>Well you could just put an elv_completed_request in there, but
>>
>
>Yeah, I told Andrew to add that for now.
>
>
>>I suppose it really wants an elv_requeue_request - which would
>>just default to elv_add_request for other schedulers.
>>
>
>I'd rather keep it seperate, ie just a requeue notifier. How's this?
>

Well it would be much nicer for AS if it were seperate. Basically
AS wants the requeue implemented as as_add_request but without
the accounting updates: there has been no request completed, and
no really new request.

If the requeue were seperate to the add, it would simply be a call
to as_completed_request in as-iosched.c.