Re: [PATCH v5 47/50] multi-process: Enable support for multiple devices in remote

[Stefan Hajnoczi]

On Mon, Feb 24, 2020 at 03:55:38PM -0500, Jagannathan Raman wrote:
> From: Elena Ufimtseva <address@hidden>
> 
> Add support to allow multiple devices to be configured in the
> remote process

This patch allows multiple devices to be addressed over a single UNIX
domain socket.  This could be a scalability/performance bottleneck
because an SMP guest can only talk to 1 device at a time.

This approach doesn't address the qemu-storage-daemon use case where one
device emulation process provides devices to multiple guests.  Multiple
UNIX domain sockets are needed for that.

Is multiplexing multiple devices over a single connection is a desirable
feature?  The alternative of one UNIX domain socket per device instance
seems more practical to me because it should perform better and solves
the qemu-storage-daemon use case.

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