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xen-devel
Re: [Xen-devel] Dom0 losing interrupts???
Am 14.02.2011 07:59, schrieb Juergen Gross:
Hi,
while trying to reproduce Andre's cpupool problem I ran into another issue:
Dom0 seems to lose hardware interrupts when it has more vcpus than pcpus
available. First I thought this could be due to my cpupool patches, but the
problem can be easily reproduced by pinning all Dom0 vcpus to a few physical
cpus and doing a parallel build then.
I used xen-unstable, kernel 2.6.32.24 from SLES11 SP1 on a 12 core INTEL
nehalem machine. I pinned all 12 Dom0 vcpus to pcpu 1-2 and started a parallel
build. After about 2 minutes the first missing interrupts were reported, a
little bit later the next one, no xen messages are printed:
[230644.814834] ata1: lost interrupt (Status 0x50)
[230682.814399] ata1: lost interrupt (Status 0x50)
[230690.814467] ata1: lost interrupt (Status 0x58)
...
[230856.718437] sd 4:2:0:0: [sda] megasas: RESET -843713 cmd=2a retries=0
[230856.739457] megaraid_sas: HBA reset handler invoked without an internal
reset condition.
[230856.766435] megasas: [ 0]waiting for 16 commands to complete
Has anyone observed a similar behavior?
Yes, me again:-)
On the rare occasions where I couldn't trigger the bug (like when using
a restricted Dom0) I observed interrupt problems, which mostly killed
the network connection:
(XEN) do_IRQ: 0.89 No irq handler for vector (irq -1)
I could solve this issue temporarily be down-ing and up-ing the network
interface, but the box became unstable later.
hypervisor and tools c/s 22858, Dom0 latest tip of PVOPS
xen/stable-2.6.32.x (2.6.32.27)
Regards,
Andre.
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