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[Qemu-devel] Can I have someone's feedback on [bug 1809075] Concurrency

From: Gao Zhiyuan
Subject: [Qemu-devel] Can I have someone's feedback on [bug 1809075] Concurrency bug on keyboard events: capslock LED messing up keycode streams causes character misses at guest kernel
Date: Wed, 19 Dec 2018 04:31:18 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1

Hi everyone.

Can I please have someone's feedback on this bug? https://bugs.launchpad.net/qemu/+bug/1809075 Briefly, guest OS loses characters sent to it via vnc. And I spot the bug in relation to ps2 driver.

I'm thinking of possible fixes and I might want to use a memory barrier. But I would really like to have some suggestion from a qemu developer first. For example, can we brutally drop capslock LED key events in ps2 queue?

It is actually relevant to openQA, an automated QA tool for openSUSE. And this bug blocks a few test cases for us.

Thank you in advance!

Kind regards,
Gao Zhiyuan

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