linux-kernel - Re: [PATCH V5 3/4] virtio-blk: Add bio-based IO path for virtio-blk

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Message-ID: <20120802222814.GA5854@redhat.com>
Date:	Fri, 3 Aug 2012 01:28:14 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Asias He <asias@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jens Axboe <axboe@...nel.dk>, Christoph Hellwig <hch@....de>,
	Tejun Heo <tj@...nel.org>, Shaohua Li <shli@...nel.org>,
	kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
	Minchan Kim <minchan.kim@...il.com>
Subject: Re: [PATCH V5 3/4] virtio-blk: Add bio-based IO path for virtio-blk

On Thu, Aug 02, 2012 at 02:25:55PM +0800, Asias He wrote:
> diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
> index c0bbeb4..95cfeed 100644
> --- a/drivers/block/virtio_blk.c
> +++ b/drivers/block/virtio_blk.c
> @@ -14,6 +14,9 @@
>  
>  #define PART_BITS 4
>  
> +static bool use_bio;
> +module_param(use_bio, bool, S_IRUGO);
> +
>  static int major;
>  static DEFINE_IDA(vd_index_ida);
>  

OK, but eventually, you plan to make this use a feature bit, yes?

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