[Xen-devel] xenU under heavy load == irq16 disabled

[Michele <vo.sinh@xxxxxxxxx>]

Hi list,

with 2.6.16 FC5 kernel and xen3.0.2 with 2.6.16.5 if I spawn a 256MB
xenU VM and launch ab -n 50000 -c 1000 http://10.0.2.11/small.html I
get the following message in xen0:

irq 16: nobody cared (try booting with the "irqpoll" option)

Call Trace: <IRQ> <ffffffff801501f4>{__report_bad_irq+48}
       <ffffffff8015040b>{note_interrupt+458} <ffffffff8014fd40>{__do_IRQ+189}
       <ffffffff8010d5c5>{do_IRQ+60} <ffffffff80254b56>{evtchn_do_upcall+134}
       <ffffffff8010b5d6>{do_hypervisor_callback+30} <EOI>
       <ffffffff801073aa>{hypercall_page+938}
<ffffffff801073aa>{hypercall_page+938}
       <ffffffff80109005>{xen_idle+132} <ffffffff80109290>{cpu_idle+76}
       <ffffffff8010931d>{cpu_idle+217} <ffffffff804a76f6>{start_kernel+497}
       <ffffffff804a70fa>{_sinittext+250}
handlers:
[<ffffffff8028ea7b>] (usb_hcd_irq+0x0/0x55)
Disabling IRQ #16


Trying with irqpoll is generally worse..a couple of times it became to
print ata timeout errors.
Is it something known ?

thank you,
Michele

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