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Re: [Qemu-devel] [PATCH] remove pieces of source code
From: |
Anthony Liguori |
Subject: |
Re: [Qemu-devel] [PATCH] remove pieces of source code |
Date: |
Fri, 29 May 2009 00:50:56 -0500 |
User-agent: |
Thunderbird 2.0.0.21 (X11/20090409) |
Glauber Costa wrote:
> Have you ever seen a girl so beautiful that you, geeky,
> think: "I'll never stand a chance"?
>
> But sometimes, you decide to make your move anyway. There's
> always the chance that in that very day she'll be specially
> in good mood, and you'll get what you want.
>
> With the exception of the fact that qemu is not a girl,
> that's more or less what I'm trying to do here: Hopefully,
> nobody will notice what I'm trying to do, and will commmit it.
> Later, when realizing, it will be too late. Victory will be mine.
>
> Or maybe people will even agree. For that, I'll try briefly
> to arguee my point, without disclosing to much, avoiding
> jeopardizing the strategy I explained above:
>
> This patch removes a piece of code that is unmaintaned,
> that does not receive an update for years,
> that get bug reports on the list that nobody fixes, because
> nobody really understands,
> that places some artificial constraints on other subsystems
>
> Signed-off-by: Glauber Costa <address@hidden
Let's actually build a proper case instead of closing our eyes and
hitting enter. Here are the downsides of kqemu I know of:
o Since it's enabled by default, it forces the default build to support
< 4GB of guest memory
o It attempts to use /dev/shm for guest memory which means a special
option is needed in the default build to use more than 1/2 of host ram size
o It touches an awful lot of places in QEMU
o Some of the BIOS changes are particularly nasty and will prevent
having a unified BIOS between QEMU and Bochs
o The kernel bits will never go upstream for Linux
o No one actively supports kqemu in upstream QEMU
That said, here are the arguments for keeping kqemu
o Even though it's unmaintained, it seems to work for people
o There is no alternative for non-Linux users and folks with non-VT/SVM
hardware
Regards,
Anthony Liguori