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[Qemu-discuss] PCI probing takes 10s of minutes

From: b f31415
Subject: [Qemu-discuss] PCI probing takes 10s of minutes
Date: Wed, 26 Dec 2018 09:02:39 -0700

I’m spinning up a VM using qemu-system-x86_64 where I’m passing the VM ~500
interfaces.   Watching the boot process I see that the PCI probing/boot
phase itself takes 10s of minutes.    I see multiple qemu processes running
extensively (eg at 200% and 100%).   The VM has 14 vcpu and 24GB of RAM.

I don’t have PCI clue and so I’m wondering what is actually happening
during this phase that would take so long?    Besides reducing the number
of interfaces, is there a way to reduce the time the VM takes to boot
during this PCI phase?


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