linux-kernel - Re: [Xen-devel] [PATCH v3] xen/blkfront: convert to blk-mq APIs

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Date:	Mon, 20 Jul 2015 15:18:14 +0100
From:	David Vrabel <david.vrabel@...rix.com>
To:	Bob Liu <bob.liu@...cle.com>, <linux-kernel@...r.kernel.org>
CC:	<hch@...radead.org>, <marcus.granado@...rix.com>, <axboe@...com>,
	<david.vrabel@...rix.com>, <avanzini.arianna@...il.com>,
	<xen-devel@...ts.xenproject.org>, <roger.pau@...rix.com>
Subject: Re: [Xen-devel] [PATCH v3] xen/blkfront: convert to blk-mq APIs

On 13/07/15 10:55, Bob Liu wrote:
> Note: This patch is based on original work of Arianna's internship for
> GNOME's Outreach Program for Women.
> 
> Only one hardware queue is used now, so there is no performance change.
> 
> The legacy non-mq code is deleted completely which is the same as other
> drivers like virtio, mtip, and nvme.
> 
> Also dropped one unnecessary holding of info->io_lock when calling
> blk_mq_stop_hw_queues().

Applied to for-linus-4.3, thanks.

> Changes in v2:
>  - Reorganized blk_mq_queue_rq()
>  - Restored most io_locks in place
> 
> Change in v3:
>  - Rename blk_mq_queue_rq to blkif_queue_rq

Next time, please put changes after a --- marker so they're
automatically dropped when applied.

David
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