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Re: [Qemu-devel] [PATCH v3 2/2] block: disable I/O throttling on sync ap
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] [PATCH v3 2/2] block: disable I/O throttling on sync api |
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Date: |
Fri, 30 Mar 2012 11:29:33 +0100 |
On Fri, Mar 30, 2012 at 9:50 AM, <address@hidden> wrote:
> + * When all sync I/O drivers are converted to async I/O, it will be
> restored
> + * to the original state.
The problem here is that guess_disk_lchs() uses bdrv_read(), not
whether device emulation uses sync or async I/O. Converting devices
to async I/O will not fix this.
Stefan