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=== Description (from pull-request) ===
Otherwise qemu expects a single queue TAP device which isn't what we're
preparing these days :)
Signed-off-by: Stéphane Graber <stgra...@ubuntu.com>
From 43799cb6446543aaf347324f07909d330866633f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Graber?= <stgra...@ubuntu.com>
Date: Thu, 17 Dec 2020 16:59:48 -0500
Subject: [PATCH] lxd/instance/qemu: Use a minimum of 2 network queues
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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Otherwise qemu expects a single queue TAP device which isn't what we're
preparing these days :)
Signed-off-by: Stéphane Graber <stgra...@ubuntu.com>
---
lxd/instance/drivers/driver_qemu.go | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/lxd/instance/drivers/driver_qemu.go
b/lxd/instance/drivers/driver_qemu.go
index 6acec3b51e..48afeace3f 100644
--- a/lxd/instance/drivers/driver_qemu.go
+++ b/lxd/instance/drivers/driver_qemu.go
@@ -2380,11 +2380,17 @@ func (d *qemu) addNetDevConfig(sb *strings.Builder,
cpuCount int, bus *qemuBus,
// Detect TAP (via TUN driver) device.
tplFields["ifName"] = nicName
+ // Run with a minimum of two queues.
+ queueCount := cpuCount
+ if queueCount < 2 {
+ queueCount = 2
+ }
+
// Number of queues is the same as number of vCPUs.
- tplFields["queues"] = cpuCount
+ tplFields["queues"] = queueCount
// Number of vectors is number of vCPUs * 2 (RX/TX) + 2
(config/control MSI-X).
- tplFields["vectors"] = 2*cpuCount + 2
+ tplFields["vectors"] = 2*queueCount + 2
tpl = qemuNetDevTapTun
} else if pciSlotName != "" {
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