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Re: [Qemu-devel] [PATCH 12/16] scsi-generic: use plain ioctl
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From: |
Christoph Hellwig |
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Subject: |
Re: [Qemu-devel] [PATCH 12/16] scsi-generic: use plain ioctl |
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Date: |
Fri, 19 Nov 2010 19:39:02 +0100 |
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User-agent: |
Mutt/1.3.28i |
On Thu, Nov 18, 2010 at 03:47:36PM +0100, Hannes Reinecke wrote:
>
> aio_ioctl is emulated anyway and currently broken.
What's broken about it currently?
> So better use 'normal' ioctl here as there are no benefits
> on using the emulated async I/O call.
There are huge benefits. Without it the whole scsi command execution
happens synchronously in the qemu main loop, blocking guest execution.