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From: Mike Christie <michaelc@cs.wisc.edu>
To: Ravi Anand <ravi.anand@qlogic.com>
Cc: James Bottomley <james.bottomley@suse.de>,
	Linux-SCSI Mailing List <linux-scsi@vger.kernel.org>,
	Karen Higgins <karen.higgins@qlogic.com>,
	Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Subject: Re: [PATCH 06/11] qla4xxx: added srb referance counter
Date: Thu, 11 Feb 2010 16:57:17 -0600	[thread overview]
Message-ID: <4B748B4D.5030809@cs.wisc.edu> (raw)
In-Reply-To: <20100211110852.GB8237@linux-qf4p>

On 02/11/2010 05:08 AM, Ravi Anand wrote:
> On Mon, 01 Feb 2010, Mike Christie wrote:
>>
>> On 01/30/2010 12:28 AM, Ravi Anand wrote:
>>>
>>> -		msleep(2000);
>>> -	} while (max_wait_time--);
>>> +		if (got_ref&&   (atomic_read(&rp->ref_count) == 1)) {
>>> +			done++;
>>> +			break;
>>> +		}
>>> +
>>> +		msleep(ABORT_POLLING_PERIOD);
>>
>>
>> Did you want to use krefs for the refcounting?
>
> We will add it to our to do list and submit a patch later on.
> For right now we will like to stick to it as kref will require
> additional testing.
>
>> And why is this so funky (got_ref arg and refcount peak) compared to the
>> qla2xxx one?
>
> I don't think qla2xxx is doing any reference counting in eh_abort() path.
> Basically its trying to differentiate for case where it takes an additional
> reference when the cmd is with the F/W. In that case if its the last guy,
> then it can go ahead and complete the command.
>

got_ref is always 0 isn't it (at least in the patch it is)? It seems 
like you can just get rid of all that and just copy qla2xxx's code.

  reply	other threads:[~2010-02-11 22:57 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-01-30  6:28 [PATCH 06/11] qla4xxx: added srb referance counter Ravi Anand
2010-02-01 18:22 ` Mike Christie
2010-02-11 11:08   ` Ravi Anand
2010-02-11 22:57     ` Mike Christie [this message]
2010-02-11 23:02       ` Mike Christie
     [not found]         ` <0CB616B0-0903-41A0-9ADD-5DD64989FFD1@qlogic.com>
2010-02-11 23:54           ` Mike Christie
2010-02-12  0:06             ` Mike Christie
2010-02-12  0:48             ` Mike Christie
2010-02-12 17:29     ` Mike Christie
2010-02-12 18:19       ` James Bottomley

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