From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Grundler Subject: Re: Longstanding bug in our IRQ code (irqbalance HPMCs parisc SMP machines) Date: Sat, 24 Apr 2010 09:13:49 -0600 Message-ID: <20100424151349.GB25138@lackof.org> References: <0D9994D5-4794-401B-8DE9-9DEA73D62B05@parisc-linux.org> <20100424143617.GD24562@lackof.org> <3E26349A-5670-4643-926D-24C04E75084C@parisc-linux.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Cc: Grant Grundler , linux-parisc@vger.kernel.org To: Thibaut =?iso-8859-1?Q?VAR=C8NE?= Return-path: In-Reply-To: <3E26349A-5670-4643-926D-24C04E75084C@parisc-linux.org> List-ID: List-Id: linux-parisc.vger.kernel.org On Sat, Apr 24, 2010 at 04:44:27PM +0200, Thibaut VAR=C8NE wrote: =2E.. > I'm not sure, it's been a very long time since I last tracked down th= is=20 > bug. Maybe I'm remembering it wrong. > FWIW, no MSI on this machine (L1000) and PCI card (sym53c896). Ok - true. We don't support MSI AFAIK. That means whatever is going wrong, is happening in the IO SAPIC. > >>> Now, I'm quite convinced that irqbalance could be one of the (major= ?) >>> cause of instability of the parisc autobuilders. AFAIU, they've =20 >>> decided >>> to disable it on their setup, maybe the situation will improve ther= e. >>> Still, irqbalance is only the messenger, and I'm wondering whether = =20 >>> that >>> apparent bug in our IRQ code could also be responsible for other =20 >>> issues >>> we're still having. >> >> Sounds like it. Though the HPMCs are clearly different than the PTE = =20 >> issues >> that jda/carlos are seeing. > > True, but I remember Debian staff complaining about random unexplaine= d =20 > hangs, I wouldn't be too surprised if this came into play... Yes, especially given the fact the "hangs" generally means the "machine suddenly stopped responding". cheers, grant -- To unsubscribe from this list: send the line "unsubscribe linux-parisc"= in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html