[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_ap
From: |
Peter Xu |
Subject: |
Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode |
Date: |
Mon, 8 Aug 2016 16:57:14 +0800 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
On Mon, Aug 08, 2016 at 03:41:23PM +0800, Chao Gao wrote:
> HI, everyone.
>
> We have done some tests after merging this patch set into the lastest qemu
> master. In kvm aspect, we use the lastest kvm linux-next branch. Here are
> some problems we have met.
>
> 1. We can't boot up a 288 vcpus linux guest with CLI:
> qemu-system-x86_64 -boot c -m 4096 -sdl -monitor pty --enable-kvm \
> -M kernel-irqchip=split -serial stdio -bios bios.bin -smp cpus=288 \
> -hda vdisk.img -device intel-iommu,intremap=on -machine q35.
> The problem exists, even after we only assign 32 vcpus to the linux guest.
> Maybe the output "do_IRQ: 146.113 No irq handler for vector (irq -1)" is a
> clue.
> The output of qemu and kernel is in attachments. Do you have any idea
> about the problem and how to solve it?
IIUC, we need to wait for Radim's QEMU patches to finally enable 288
vcpus?
Btw, could you please try adding this to the QEMU cmdline when testing
with 32 vcpus:
-global ioapic.version=0x20
I see that you were running RHEL 7.2 guest with a default e1000. In
that case, we may need to boost ioapic version to 0x20.
Thanks,
-- peterx
- [Qemu-devel] [PATCH for-2.8 12/18] pc: apic_common: reset APIC ID to initial ID when switching into x2APIC mode, (continued)
- [Qemu-devel] [PATCH for-2.8 12/18] pc: apic_common: reset APIC ID to initial ID when switching into x2APIC mode, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 13/18] pc: kvm_apic: pass APIC ID depending on xAPIC/x2APIC mode, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 14/18] pc: clarify FW_CFG_MAX_CPUS usage comment, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 16/18] pc: add 'etc/boot-cpus' fw_cfg file for machine with more than 255 CPUs, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 15/18] increase MAX_CPUMASK_BITS from 255 to 288, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 17/18] pc: add 2.8 machine, Igor Mammedov, 2016/08/05
- [Qemu-devel] [PATCH for-2.8 18/18] pc: q35: bump max_cpus to 288, Igor Mammedov, 2016/08/05
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Chao Gao, 2016/08/08
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode,
Peter Xu <=
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Chao Gao, 2016/08/09
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Peter Xu, 2016/08/09
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Peter Xu, 2016/08/09
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Jan Kiszka, 2016/08/09
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Peter Xu, 2016/08/09
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Radim Krčmář, 2016/08/09
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Chao Gao, 2016/08/09
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Radim Krčmář, 2016/08/09
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Igor Mammedov, 2016/08/09
- Re: [Qemu-devel] [PATCH for-2.8 00/18] pc: q35: x2APIC support in kvm_apic mode, Peter Xu, 2016/08/09