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Message-ID: <3D4FAA87.8040303@evision.ag>
Date: Tue, 06 Aug 2002 12:52:55 +0200
From: Marcin Dalecki <dalecki@evision.ag>
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To: Jens Axboe <axboe@suse.de>
CC: martin@dalecki.de, Petr Vandrovec <VANDROVE@vc.cvut.cz>,
       linux-kernel@vger.kernel.org, torvalds@transmeta.com
Subject: Re: [PATCH] 2.5.30 IDE 113
References: <13A77E76028@vcnet.vc.cvut.cz> <3D4FA2F8.2050305@evision.ag> <20020806104238.GB1132@suse.de> <3D4FA845.90702@evision.ag> <20020806105450.GD1323@suse.de>
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Uz.ytkownik Jens Axboe napisa?:
> On Tue, Aug 06 2002, Marcin Dalecki wrote:
> 
>>Uz.ytkownik Jens Axboe napisa?:
>>
>>>On Tue, Aug 06 2002, Marcin Dalecki wrote:
>>>
>>>
>>>>device not per channel! If q->request_fn would properly return the
>>>>error count instead of void, we could even get rid ot the
>>>>checking for rq->errors after finishment... But well that's
>>>>entierly different story.
>>>
>>>
>>>That's nonsense! What exactly would you return from a request_fn after
>>>having queued, eg, 20 commands? Error count is per request, anything
>>>else would be stupid.
>>
>>Returning the error count in the case q->request_fn is called for
>>a self submitted request like for example REQ_SPECIAL would be handy and 
>>well defined. For the cumulative case it would of course make sense to 
>>return the cumulative error count. Tough not very meaningfull, it would
>>indicate the occurrence of the error very fine.
> 
> 
> It's much nicer to maintain a sane API that doesn't depend on stuff like
> the above. Cumulative error count, come on, you can't possibly be
> serious?!

Hey don't get me wrong - I *do not* suggest adding it becouse I don't 
think we are going to change the "eat as many as possible requests" 
instead of "eat one request" semantics of the q->reuqest_fn().
OK?

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