Re: [Qemu-devel] [PATCH] docs/multiple-iothreads.txt: add documentation on IOThread programming

[Eric Blake]

On 06/09/2014 07:59 AM, Stefan Hajnoczi wrote:
> This document explains how IOThreads and the main loop are related,
> especially how to write code that can run in an IOThread.  Currently on
> virtio-blk-data-plane uses these techniques.  The next obvious target is
> virtio-scsi; there has also been work on virtio-net.
> 
> Signed-off-by: Stefan Hajnoczi <address@hidden>
> ---
>  docs/multiple-iothreads.txt | 124 
> ++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 124 insertions(+)
>  create mode 100644 docs/multiple-iothreads.txt
> 
> diff --git a/docs/multiple-iothreads.txt b/docs/multiple-iothreads.txt
> new file mode 100644
> index 0000000..f2b008d
> --- /dev/null
> +++ b/docs/multiple-iothreads.txt
> @@ -0,0 +1,124 @@
> +This document explains the IOThread feature and how to write code that runs
> +outside the QEMU global mutex.

Pre-existing epidemic in this directory, but should you assert copyright
and a license?

> +
> +The main loop and IOThreads
> +---------------------------
> +QEMU is an event-driven program that can do several things at once using an
> +event loop.  The VNC server and the QMP monitor are both processed from the
> +same event loop which monitors their file descriptors until they become

s/loop/loop,/

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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