Re: [PATCH 01/11] block: blktrace framework cleanup

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On 6/29/20 10:10 PM, Christoph Hellwig wrote:
> On Mon, Jun 29, 2020 at 04:43:04PM -0700, Chaitanya Kulkarni wrote:
>> This patch removes the extra variables from the trace events and
>> overall kernel blktrace framework. The removed members can easily be
>> extracted from the remaining argument which reduces the code
>> significantly and allows us to optimize the several tracepoints like
>> the next patch in the series.
> The subject sounds a litle strange, I'd rather say:
> 
> "block: remove superflous arguments from tracepoints"
> 
> The actual changes look good to me.
Okay, will change that.
> 
>> +		trace_block_rq_insert(rq);
>>   	}
>>   
>>   	spin_lock(&ctx->lock);
>> @@ -2111,7 +2111,7 @@ blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
>>   		goto queue_exit;
>>   	}
>>   
>> -	trace_block_getrq(q, bio, bio->bi_opf);
>> +	trace_block_getrq(bio, bio->bi_opf);
> But now that you remove more than the q argument in some spots you
> might remove the op one here as well.  Or limit the first patch to
> just the queue argument..
> 
> 

Yeah thats is where I had difficulty, and when I tried to do it in one
patch it got complicated to review. I'll keep the first patch for the
q only and patch(s) for rest arguments as needed it easy to review that
way.




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