From mboxrd@z Thu Jan 1 00:00:00 1970 From: gshan Subject: Re: [HELP] BAD interrupts Date: Thu, 24 Dec 2009 06:46:25 -0500 Message-ID: <4B335491.1020203@alcatel-lucent.com> References: <9F4C7D19E8361D4C94921B95BE08B81BA09038@zin33exm22.fsl.freescale.net> <1261608230.3401.16.camel@concordia> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Kumar Gopalpet-B05799 To: michael@ellerman.id.au Return-path: In-Reply-To: <1261608230.3401.16.camel@concordia> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linuxppc-dev-bounces+glppd-linuxppc64-dev=m.gmane.org@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+glppd-linuxppc64-dev=m.gmane.org@lists.ozlabs.org List-Id: netdev.vger.kernel.org Michael Ellerman wrote: > On Wed, 2009-12-23 at 19:41 +0530, Kumar Gopalpet-B05799 wrote: > >> Hi all, >> >> I am trying linux 2.6.32-rc3 in SMP mode. I am seeing a lot of BAD >> interrupts when I do a "cat /proc/interrupts". >> >> I am running a forwarding application b/w two ethernet ports (ethernet >> uses gianfar driver). >> >> Has any one observed these BAD interrupts ? If so, can someone help me >> in understanding why these interrupts come and how to resolve it ? >> > > You'll need to tell us what platform you're running on. > > The BAD interrupts come from ppc_spurious_interrupts. It's a count of > the number of times we entered do_IRQ() (ie. took an external > interrupt), but when we asked the interrupt controller which irq it was, > the interrupt controller said there was no irq. > > Depending on your interrupt controller that might happen sometimes for > valid reasons. Or it might indicate something is setup wrong. > > cheers > I think it will help to show us your /proc/interrupts so that how you suffered from bad interrupts.