From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Vrabel <david.vrabel@citrix.com>
Subject: Re: dom0 kernel - irq nobody cared ... the continuing
 saga ..
Date: Mon, 9 Feb 2015 15:18:15 +0000
Message-ID: <54D8CFB7.6060000@citrix.com>
References: <132553031.20150209160327@eikelenboom.it>
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To: Sander Eikelenboom <linux@eikelenboom.it>, Jan Beulich <JBeulich@suse.com>, David Vrabel <david.vrabel@citrix.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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On 09/02/15 15:03, Sander Eikelenboom wrote:
> Hi Jan / David / Konrad,
> 
> I was just testing a 3.19 kernel on my intel machine and again
> ran into the sporadically appearing "irq nobody cared" on the dom0 kernel.
> This occurs now for quite some kernel versions (running xen-unstable now,
> but it also appeared in the past with builds that are now xen-4.5).

I wouldn't suspect anything Xen related here.  IRQ #18 is a shared
line-level interrupt so other driver/device that was/is sharing than
line is misbehaving.

I'd recommend seeing if your BIOS has a option to put the disk
controllers into AHCI mode which would allow them to use MSIs (I think).

David