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Re: [Qemu-devel] qemu AIO worker threads change causes Guest OS hangup
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] qemu AIO worker threads change causes Guest OS hangup |
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Date: |
Tue, 1 Mar 2016 16:34:04 -0500 (EST) |
----- Original Message -----
> From: "Huaicheng Li" <address@hidden>
> I’m trying to add some latency conditionally to I/O requests (qemu_paiocb,
> from **IDE** disk emulation, **raw** image file).
Paolo already covered the technical issue with what you're doing.
Have you seen Linux Documentation/device-mapper/delay.txt?
You could set up a loopback block device and put the device-mapper delay target
on top to simulate latency.
Stefan