Re: [PATCH] properly set video ram size for qemu VGA video device

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On Mon, Jul 07, 2014 at 01:44:06PM +0200, Pavel Hrdina wrote:
https://bugzilla.redhat.com/show_bug.cgi?id=1076098

We support vram option for video devices in domain xml, but so far
only for QXL it had some effect. VGA video device in QEMU can also
accept the size of video ram and we should pass it.

Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
---
src/qemu/qemu_command.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index fb64cda..09e29c9 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -4800,6 +4800,9 @@ qemuBuildDeviceVideoStr(virDomainDefPtr def,

        /* QEMU accepts bytes for vram_size. */
        virBufferAsprintf(&buf, ",vram_size=%u", video->vram * 1024);
+    } else if (video->type == VIR_DOMAIN_VIDEO_TYPE_VGA) {

The patch [1] that adds this option also adds it for VMWare VGA, can
we use that too?

+        /* QEMU accepts megabytes for vgamem_mb. */
+        virBufferAsprintf(&buf, ",vgamem_mb=%u", video->vram / 1024);

How will this behave with pre-1.1.0 qemu (without the commit mentioned
[1])?  Will it (a) just skip the parameter or will it (b) error out?
In case of (b) this is a regression.

Martin

P.S.: Some tests in qemuxml2argv would go nicely with such change.

[1] 4a1e244eb65c646bdd938d9d137ace42d76c95a7

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