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Re: [Qemu-ppc] qemu-system-ppc video artifacts since "tcg: drop global l

From: Mark Cave-Ayland
Subject: Re: [Qemu-ppc] qemu-system-ppc video artifacts since "tcg: drop global lock during TCG code execution"
Date: Mon, 13 Mar 2017 21:28:18 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Icedove/45.6.0

On 13/03/17 21:25, Mark Cave-Ayland wrote:

> I've recently noticed some video artifacts appearing in the form of
> horizontal lines whilst testing OpenBIOS boot on some qemu-system-ppc
> images (see https://www.ilande.co.uk/tmp/qemu/macos9-stripe.png for an
> example) which I've finally bisected down to this commit.
> The horizontal lines tend to appear at different positions with
> different lengths, although it seems to be more common that a complete
> scanline is affected. Reproducing the issue is fairly easy with a MacOS
> 9.2.1 ISO and the command line below:
> ./qemu-system-ppc -cdrom MacOS921.iso -boot d -m 512 -M mac99
> Could it be that this patch is still missing a lock somewhere which
> causes these artifacts to appear?

(Apologies - resending as forgot to add CCs for qemu-devel and qemu-ppc)



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