From: Jens Axboe <axboe@kernel.dk>
To: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>, Jeff Moyer <jmoyer@redhat.com>,
Mike Snitzer <snitzer@redhat.com>,
Markus Trippelsdorf <markus@trippelsdorf.de>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
linux-kernel@vger.kernel.org,
Chris Mason <chris.mason@oracle.com>
Subject: Re: [PATCH] block: eliminate ELEVATOR_INSERT_REQUEUE
Date: Wed, 30 Mar 2011 13:23:43 +0200 [thread overview]
Message-ID: <4D9312BF.6010406@kernel.dk> (raw)
In-Reply-To: <20110330112040.GF17523@htj.dyndns.org>
On 2011-03-30 13:20, Tejun Heo wrote:
> Hello, Jens.
>
> On Wed, Mar 30, 2011 at 12:16:13PM +0200, Jens Axboe wrote:
>> @@ -261,7 +261,7 @@ static bool blk_kick_flush(struct request_queue *q)
>> q->flush_rq.end_io = flush_end_io;
>>
>> q->flush_pending_idx ^= 1;
>> - elv_insert(q, &q->flush_rq, ELEVATOR_INSERT_REQUEUE);
>> + __elv_add_request(q, &q->flush_rq, ELEVATOR_INSERT_FLUSH);
>
> Shouldn't this be list_add_tail(&rq->queuelist, &q->queue_head)?
> __elv_add_request(FLUSH) calls back into blk_insert_flush() which
> decomposes the flush request from FS into flush sequence.
> blk_kick_flush() is used to insert the decomposed sequence requests
> into the dispatch queue.
Mid-air collision, I just sent that addon out to Sergey who tested. Yes
of course it should be a regular list_add, the above is a braino.
--
Jens Axboe
next prev parent reply other threads:[~2011-03-30 11:23 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-25 15:15 [OOPS] elevator private data for REQ_FLUSH Sergey Senozhatsky
2011-03-25 15:22 ` Markus Trippelsdorf
2011-03-25 15:40 ` Mike Snitzer
2011-03-25 15:50 ` Jens Axboe
2011-03-25 18:54 ` Mike Snitzer
2011-03-25 19:50 ` Jens Axboe
2011-03-26 4:21 ` Mike Snitzer
2011-03-28 8:23 ` Tejun Heo
2011-03-28 22:15 ` [PATCH] block: eliminate ELEVATOR_INSERT_REQUEUE (was: Re: elevator private data for REQ_FLUSH) Mike Snitzer
2011-03-29 11:56 ` [PATCH] block: eliminate ELEVATOR_INSERT_REQUEUE Jens Axboe
2011-03-29 14:18 ` Mike Snitzer
2011-03-29 18:25 ` [PATCH] " Christoph Hellwig
2011-03-30 7:42 ` Tejun Heo
2011-03-30 7:53 ` Jens Axboe
2011-03-29 14:13 ` [PATCH] block: eliminate ELEVATOR_INSERT_REQUEUE (was: Re: elevator private data for REQ_FLUSH) Jeff Moyer
2011-03-29 17:54 ` Vivek Goyal
2011-03-30 7:41 ` Tejun Heo
2011-03-30 7:57 ` Tejun Heo
2011-03-30 7:59 ` [PATCH] block: eliminate ELEVATOR_INSERT_REQUEUE Jens Axboe
2011-03-30 8:02 ` Tejun Heo
2011-03-30 10:16 ` Jens Axboe
2011-03-30 11:20 ` Tejun Heo
2011-03-30 11:23 ` Jens Axboe [this message]
2011-03-30 11:21 ` Sergey Senozhatsky
2011-03-30 11:22 ` Jens Axboe
2011-03-30 11:49 ` Sergey Senozhatsky
2011-03-30 13:46 ` Vivek Goyal
2011-03-30 13:49 ` Tejun Heo
2011-03-30 14:01 ` Mike Snitzer
2011-03-30 14:27 ` Tejun Heo
2011-03-30 15:22 ` Vivek Goyal
2011-03-30 15:30 ` Tejun Heo
2011-03-30 17:13 ` Jens Axboe
2011-03-30 17:32 ` Tejun Heo
2011-03-30 17:56 ` Jeff Moyer
2011-03-30 18:12 ` Jens Axboe
2011-03-25 15:57 ` [OOPS] elevator private data for REQ_FLUSH Jens Axboe
2011-03-25 16:03 ` Markus Trippelsdorf
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