msk0: interrupt storm

[Pavel Gorshkov]

On Thu, Mar 01, 2012 at 05:29:55PM -0800, YongHyeon PYUN wrote:
> On Wed, Feb 29, 2012 at 01:03:29AM +0400, Pavel Gorshkov wrote:
> > My laptop running 9.0-RELEASE/amd64/GENERIC freezes and
> > (sometimes) unfreezes intermittently, logging the following:
> > 
> > Feb 28 23:07:36 lifebook kernel: interrupt storm detected on "irq259:"; throttling interrupt source
> > 
> > $ vmstat -i
> > ...
> > irq259: mskc0                   11669511       3456
> > 
> > 
> > Looks very similar to this:
> > http://www.freebsd.org/cgi/query-pr.cgi?pr=164569
> > 
> > Any suggestions?
> 
> Try disabling MSI and see whether that makes any difference.

hw.msk.msi_disable is not recognized as a valid sysctl variable
and I'm not sure about it having any effect whatsoever, but
putting hw.msk.msi_disable=1 into /boot/loader.conf seems to have
resulted in this:

    irq16: mskc0 uhci0                355402        884

that is, msk0 is now on irq16, but the freezes are still there:

Mar  1 23:55:12 lifebook kernel: interrupt storm detected on "irq16:"; throttling interrupt source