linux-kernel - Re: [PATCH v1 5/9] block: loop: convert to blk-mq

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Date:	Thu, 21 Aug 2014 13:44:48 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Kleikamp <dave.kleikamp@...cle.com>,
	Zach Brown <zab@...bo.net>, Benjamin LaHaise <bcrl@...ck.org>,
	Kent Overstreet <kmo@...erainc.com>,
	"open list:AIO <linux-aio@...ck.org>, Linux FS Devel
	<linux-fsdevel@...r.kernel.org>, Dave Chinner" <david@...morbit.com>
Subject: Re: [PATCH v1 5/9] block: loop: convert to blk-mq

On Wed, Aug 20, 2014 at 4:50 AM, Jens Axboe <axboe@...nel.dk> wrote:

>
>
> Reworked a bit more:
>
> http://git.kernel.dk/?p=linux-block.git;a=commit;h=a323185a761b9a54dc340d383695b4205ea258b6

One big problem of the commit is that it is basically a serialized workqueue
because of single &hctx->run_work, and per-req work_struct has to be
used for concurrent implementation.  So looks the approach isn't flexible
enough compared with doing that in driver, or any idea about how to fix
that?


Thanks
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