From: Gerd Hoffmann <kraxel@redhat.com>
To: "Gonglei (Arei)" <arei.gonglei@huawei.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [Bug] cirrus_vga: qemu abort at booting when configure vgamem_mb <= 2
Date: Fri, 09 May 2014 08:49:25 +0200 [thread overview]
Message-ID: <1399618165.5213.42.camel@nilsson.home.kraxel.org> (raw)
In-Reply-To: <33183CC9F5247A488A2544077AF19020815E738B@SZXEMA503-MBS.china.huawei.com>
On Fr, 2014-05-09 at 03:47 +0000, Gonglei (Arei) wrote:
> Hi, Gerd
>
> The issue consequentially occur, I have tested various qemu versions,
> including the current qemu.git.
Missing sanity check. It's not valid. We mimic existing hardware here,
and the cirrus card emulated has 4 MB video memory. So ideally we
should just use that and be done with it. Problem is qemu has
historically used 8 or 16 mb vga memory for cirrus, and simply changing
it will break live migration.
So cirrus should accept 4 MB (correct value), 8 MB and 16 MB (for
backward compatibility) and reject everything else. Patches are
welcome ;)
If you want reduce the qemu memory footprint use stdvga instead which
should handle memory sized from 1 MB to 256 MB just fine.
cheers,
Gerd
next prev parent reply other threads:[~2014-05-09 6:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-09 3:47 [Qemu-devel] [Bug] cirrus_vga: qemu abort at booting when configure vgamem_mb <= 2 Gonglei (Arei)
2014-05-09 6:49 ` Gerd Hoffmann [this message]
2014-05-09 6:59 ` Gonglei (Arei)
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