Re: [PATCH 1/1] [virt] virtio-blk: Use ida to allocate disk index

From: Rusty Russell
Date: Wed Jun 01 2011 - 21:58:09 EST

On Wed, 1 Jun 2011 03:24:29 -0400, Mark Wu <dwu@xxxxxxxxxx> wrote:
> Current index allocation in virtio-blk is based on a monotonically
> increasing variable "index". It could cause some confusion about disk
> name in the case of hot-plugging disks. And it's impossible to find the
> lowest available index by just maintaining a simple index. So it's
> changed to use ida to allocate index via referring to the index
> allocation in scsi disk.
> Signed-off-by: Mark Wu <dwu@xxxxxxxxxx>

Hi Mark,

I don't believe that we do disk probes in parallel, so the spinlock
is unnecessary. Otherwise, this looks good.

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