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Re: [Qemu-devel] virtqueue corruption in emulation mode?

From: Sinha, Ani
Subject: Re: [Qemu-devel] virtqueue corruption in emulation mode?
Date: Wed, 28 Sep 2011 13:44:35 -0500

On Sep 28, 2011, at 9:47 AM, Stefan Hajnoczi wrote:

I need a helper thread to do blocking IO. The device IOCTLS are inherently blocking, unfortunately.

posix-aio-compat.c already implements a threadpool.  It is geared
towards using the QEMU block layer (BlockDriverState) but the pure
ioctl codepath can be used without a BlockDriverState by passing NULL.
So this could save you some effort, check out paio_submit().

;) yeah, I realized that after looking at the code that I could have used that infrastructure. May be in the next release of this driver I will do that or more realistically when I write another driver, I will make use of it. However, I have one reservation about that code. Like you said, it is geared towards the QEMU block driver. I believe the code can be reworked to be more generic so that it can be reused elsewhere as is.


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