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From: Hannes Laimer <h.laimer@proxmox.com>
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Date: Tue, 26 Nov 2024 15:52:38 +0100
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Subject: [pve-devel] [PATCH qemu-server v3] fix #3588: helper: consider NIC
count for config-specific timeout
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There have been some reports about `qm start` timeouts on VMs that have a
lot of NICs assigned.
This patch considers the number of NICs when calculating the config-specific
timeout. Since the increase in start time is linearly related to the number
of NICs, a constant timeout increment per NIC was chosen.
Signed-off-by: Hannes Laimer <h.laimer@proxmox.com>
---
changes since v3:
* move scalar() to wrap grep...
* match against `\d+` instead of `\d{1,2}`
PVE/QemuServer/Helpers.pm | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/PVE/QemuServer/Helpers.pm b/PVE/QemuServer/Helpers.pm
index 15e2496c..72a46a0a 100644
--- a/PVE/QemuServer/Helpers.pm
+++ b/PVE/QemuServer/Helpers.pm
@@ -167,6 +167,15 @@ sub config_aware_timeout {
$timeout = 150;
}
+ # Some testing showed that adding a NIC increased the start time by ~450ms
+ # consistently across different NIC models, options and already existing
+ # number of NICs.
+ # So 10x that to account for any potential system differences seemed
+ # reasonable. User reports with real-life values (20+: ~50s, 25: 45s, 17: 42s)
+ # also make this seem a good value.
+ my $nic_count = scalar (grep { /^net\d+/ } keys %{$config});
+ $timeout += $nic_count * 5;
+
return $timeout;
}
--
2.39.5
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