linux-kernel - Re: [PATCH] cfq: get rid of cfqq hash

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Date:	Wed, 25 Apr 2007 15:50:27 +0400
From:	Vasily Tarasov <vtaras@...nvz.org>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	OVZDL <devel@...nvz.org>
Subject: Re: [PATCH] cfq: get rid of cfqq hash

>> @@ -1806,7 +1765,11 @@ static int cfq_may_queue(request_queue_t
>>  	 * so just lookup a possibly existing queue, or return 'may queue'
>>  	 * if that fails
>>  	 */
>> -	cfqq = cfq_find_cfq_hash(cfqd, key, tsk->ioprio);
>> +	cic = cfq_get_io_context_noalloc(cfqd, tsk);
>> +	if (!cic)
>> +		return ELV_MQUEUE_MAY; 
>> +
>> +	cfqq = cic->cfqq[rw & REQ_RW_SYNC];
>>  	if (cfqq) {
>>  		cfq_init_prio_data(cfqq);
>>  		cfq_prio_boost(cfqq);
> 
> Ahem, how well did you test this patch?

Ugh, again: bio_sync() returns not only 0/1
Sorry for giving so much trouble...

BTW, what tests do you use to check patches?
I'll run them on our nodes each time when sending it to you.
At the moment I use some self made tests and a bit fio scripts.

> 
> -- 
> Jens Axboe
-
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