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Date:      Fri, 2 Mar 2012 10:05:54 -0800
From:      YongHyeon PYUN <pyunyh@gmail.com>
To:        Pavel Gorshkov <gorshkov.pavel@gmail.com>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: msk0: interrupt storm
Message-ID:  <20120302180554.GA1632@michelle.cdnetworks.com>
In-Reply-To: <20120301211356.GA2603@localhost>
References:  <20120228210329.GA2741@localhost> <20120302012955.GC1685@michelle.cdnetworks.com> <20120301211356.GA2603@localhost>

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On Fri, Mar 02, 2012 at 01:13:56AM +0400, Pavel Gorshkov wrote:
> 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

hw.msk.msk_disable is a loader tunable so it can't be set after
boot. See msk(4) for more information.

> 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

Still have no idea. Would you post dmesg output?
If you know how to reproduce the issue, let me know.



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