From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH block#for-2.6.31 1/3] ub: use __blk_end_request_all()
Date: Sat, 16 May 2009 07:19:48 +0900
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References: <4A0D86DB.9000203@kernel.org> <20090515113114.68ae93ae.zaitcev@redhat.com>
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To: Pete Zaitcev <zaitcev@redhat.com>
Cc: Jens Axboe <jens.axboe@oracle.com>, James Bottomley <James.Bottomley@HansenPartnership.com>, Boaz Harrosh <bharrosh@panasas.com>, Linux Kernel <linux-kernel@vger.kernel.org>, linux-scsi <linux-scsi@vger.kernel.org>, IDE/ATA development list <linux-ide@vger.kernel.org>, Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>, Borislav Petkov <petkovbb@googlemail.com>

Pete Zaitcev wrote:
> On Sat, 16 May 2009 00:14:35 +0900, Tejun Heo <tj@kernel.org> wrote:
> 
>> @@ -834,12 +829,7 @@ static void ub_end_rq(struct request *rq
>>  		error = -EIO;
>>  		rq->errors = scsi_status;
>>  	}
>> -	rqlen = blk_rq_bytes(rq);    /* Oddly enough, this is the residue. */
>> -	if (__blk_end_request(rq, error, cmd_len)) {
>> -		printk(KERN_WARNING DRV_NAME
>> -		    ": __blk_end_request blew, %s-cmd total %u rqlen %ld\n",
>> -		    blk_pc_request(rq)? "pc": "fs", cmd_len, rqlen);
>> -	}
>> +	__blk_end_request_all(rq, error);
>>  }
> 
> I applaud this. We needed blk_end_this_mudafakin_request() for a long time.
> Why two underscores?

The ones with two underscores are to be called with queue lock held.
Ones without grab queue lock themselves.

Thanks.

-- 
tejun