@Stefan Bader,
The host OS is ubuntu 12.04, and we upgraded the QEMU to 2.0.0 from ubuntu
cloud-archive repo.
https://wiki.ubuntu.com/ServerTeam/CloudArchive
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Bader,
We don't see this problem after the patch is applied. I think we can
close this case.
Regards,
CY.
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https://bugs.launchpad.net/bugs/1465935
Title:
kvm_irqchip_commit_routes:
Bader,
Sorry to response late.
We patch our QEMU 2.0 and running on ubuntu 12.04, and shall keep it running
for a while.
I'll let you know if this problem is gone after weeks.
Regards,
CY.
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-Original Message-
From: Paolo Bonzini [mailto:pbonz...@redhat.com]
Sent: 2015年7月1日 21:39
To: Li, Chengyuan
Cc: kevin...@tencent.com
Subject: Re: [Qemu-devel] [PATCH] Fix irq route entries exceed
KVM_MAX_IRQ_ROUTES
On 30/06/2015 05:47, Li, Chengyuan wrote:
> Here is my understand
Ryan,
Our Hypervisors are running in the internal network which can't access to
Launchpad,
# apport-collect 1465935
ERROR: connecting to Launchpad failed: [Errno 110] Connection timed out
We saw this qemu crash on 18 Hypervisor nodes. So far all our
hypervisors are ubuntu 12.04, qemu-2.0.0+dfsg
http://lists.gnu.org/archive/html/qemu-devel/2015-01/msg00822.html
Seems that the latest version code has answered maintainers questions.
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Title:
>From kvm_pc_setup_irq_routing() function, we can see that 15 routes from
PIC and 23 routes from IOAPIC are added into irq route table, but only
23 irq(gsi) are reserved. This leads to irq route table has been full
but there are still tens of free gsi. So the "retry" part of
kvm_irqchip_get_virq()
** Also affects: qemu (Ubuntu)
Importance: Undecided
Status: New
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Title:
kvm_irqchip_commit_routes: Assertion `ret == 0' failed
Statu
>From the debug log, we can see that virq is only 1008, but irq route table has
>been full, i.e. 1024.
In kvm_irqchip_get_virq(), it only calls kvm_flush_dynamic_msi_routes() when
all virqs(total gsi_count, 1024 too) have been allocated, but irq route table
has two kind of entry type, KVM_IRQ
http://lists.nongnu.org/archive/html/qemu-devel/2014-12/msg03739.html
Seems that this patch hasn't been accpeted yet, and also no comments for
it.
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The problem can be re-produced by the script in the below in link.
http://lists.nongnu.org/archive/html/qemu-devel/2014-12/msg03739.html
i.e.
vda_irq_num=25
vdb_irq_num=27
while [ 1 ]
do
for irq in {1,2,4,8,10,20,40,80}
do
echo $irq > /proc/irq/$vda_irq_num/smp_affinity
Public bug reported:
Several my QEMU instances crashed, and in the qemu log, I can see this
assertion failure,
qemu-system-x86_64: /build/buildd/qemu-2.0.0+dfsg/kvm-all.c:984:
kvm_irqchip_commit_routes: Assertion `ret == 0' failed.
The QEMU version is 2.0.0, HV OS is ubuntu 12.04, kernel 3.2
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