On Sat, Mar 9, 2013 at 1:49 PM, Neil Horman <nhorman@xxxxxxxxxxxxx> wrote: > On Mon, Mar 04, 2013 at 02:04:19PM -0500, Neil Horman wrote: >> A few years back intel published a spec update: >> http://www.intel.com/content/dam/doc/specification-update/5520-and-5500-chipset-ioh-specification-update.pdf >> >> For the 5520 and 5500 chipsets which contained an errata (specificially errata >> 53), which noted that these chipsets can't properly do interrupt remapping, and >> as a result the recommend that interrupt remapping be disabled in bios. While >> many vendors have a bios update to do exactly that, not all do, and of course >> not all users update their bios to a level that corrects the problem. As a >> result, occasionally interrupts can arrive at a cpu even after affinity for that >> interrupt has be moved, leading to lost or spurrious interrupts (usually >> characterized by the message: >> kernel: do_IRQ: 7.71 No irq handler for vector (irq -1) >> >> There have been several incidents recently of people seeing this error, and >> investigation has shown that they have system for which their BIOS level is such >> that this feature was not properly turned off. As such, it would be good to >> give them a reminder that their systems are vulnurable to this problem. >> >> Signed-off-by: Neil Horman <nhorman@xxxxxxxxxxxxx> >> CC: Prarit Bhargava <prarit@xxxxxxxxxx> >> CC: Don Zickus <dzickus@xxxxxxxxxx> >> CC: Don Dutile <ddutile@xxxxxxxxxx> >> CC: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> >> CC: Asit Mallick <asit.k.mallick@xxxxxxxxx> >> CC: linux-pci@xxxxxxxxxxxxxxx >> > Ping, anyone want to Ack/Nack this? Don's comment earlier seems to imply that this is a short term fix and that a more long term fix may be coming soon. If that is the case wouldn't we want to wait for the long term fix and just pull that in? Myron > Neil > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
