From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: bruce.edge@gmail.com, Ray.Lin@lsi.com, linux@eikelenboom.it,
caker@theshore.net, xen-devel@lists.xensource.com, keir@xen.org,
Ian.Campbell@eu.citrix.com, m.a.young@durham.ac.uk, jeremy
Subject: Xen 4.1 interrupts not delievered.
Date: Tue, 12 Oct 2010 13:17:45 -0400 [thread overview]
Message-ID: <20101012171745.GA27232@dumpdata.com> (raw)
Hey folks,
The last month there was a flurry of emails about PCI passthrough devices and
some that in which a high load is put on machine and interrupts are
not being delivered (to Dom0 it looks that way) - and even the cases where
there are no PCI passthrough enabled.
Three things that pop up is that:
1). Xen 3.4.4-rc1-pre does not have this problem (this is Mr. Christopher
email about 3Ware 9690SA).
2). Moving all Domains from physical cpu 0 makes the problem go away
(this is Mr. Sander email about High cpu load for events/0).
3). No fixes yet.
A couple of that might fix the problems are:
1). Ian's fix to the event channels:
http://xenbits.xen.org/gitweb?p=people/ianc/linux-2.6.git;a=commit;h=5d30cb2a85912ffb5f6556d55472c26801eef2ea
2). Disable IRQ balancing in Xen (and also in Linux kernel). "noirqbalance"
3). Pin domains, but nothing to Domain 0.
But it might be worth trying them out?
next reply other threads:[~2010-10-12 17:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-12 17:17 Konrad Rzeszutek Wilk [this message]
2010-10-12 23:34 ` Xen 4.1 interrupts not delievered Keir Fraser
2010-10-13 7:00 ` Sander Eikelenboom
2010-10-13 7:52 ` Keir Fraser
2010-10-16 17:56 ` Sander Eikelenboom
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