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Date: Sat, 07 Jun 2014 17:54:20 -0400
From: Allan Jude <allanjude@freebsd.org>
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To: freebsd-virtualization@freebsd.org
Subject: Re: interrupt storm on ahci
References: <20140607212440.GB3163@mouf.net> <539383F3.2060307@freebsd.org>
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On 2014-06-07 17:28, Peter Grehan wrote:
> Hi Steve,
> 
>> I'm running a FreeBSD guest in bhyve on a FreeBSD host. Both are running
>> FreeBSD CURRENT, r266947. I've gotten this message about 12 times
>> since boot:
>>
>> interrupt storm detected on "irq268:"; throttling interrupt source
>>
>> vmstat -i shows:
>>
>> irq268: ahci1                  236514222        839
>>
>> ahci1 is the second disk connected to the system:
>>
>> ahci1: <Intel ICH8 AHCI SATA controller> mem 0xc0002400-0xc00027ff irq
>> 18 at device 4.0 on pci0
>>
>> The VM itself runs poudriere and was building a bunch of packages. At the
>> moment, the VM seems to be in a rather odd state. The poudriere jails are
>> running, but not doing anything. Ideas?
> 
>  Is this an 8.* host ? I don't believe AHCI has MSI support on that
> version, and AHCI legacy interrupts haven't had a huge amount of testing
> under load.
> 
>  If it is 8.*, I'd recommend using virtio-blk for the block device until
> we can work out what's going wrong.
> 
> later,
> 
> Peter.
> 
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He mentioned that both the host and guest are recent -CURRENT

-- 
Allan Jude