On 08/20/2011 05:48 AM, Bjorn Helgaas wrote: > On Tue, Aug 16, 2011 at 9:43 PM, Pavel Ivanov <paivanof@xxxxxxxxx> wrote: >> Ever since I switched from kernel 2.6.38 to 3.0 and later versions I >> always get the following error message on each boot: >> >> [ 2.844242] APEI: Can not request iomem region >> <00000000bf7b522a-00000000bf7b522c> for GARs. >> >> If it was only in dmesg I wouldn't even notice it. But it's always >> printed on the console which is kind of annoying. >> I don't quite understand what this message is about and couldn't find >> anything on the internet. Does this message mean some error that I >> could fix? If no, is there any way I can suppress it (besides lowering >> the error level of messages printed on console, of course)? > > [+cc Huang Ying, APEI author] > > BIOS-e820: 00000000bf79e000 - 00000000bf7d0000 (ACPI NVS) > APEI: Can not request iomem region <00000000bf7b522a-00000000bf7b522c> for GARs. > > This register is in the ACPI NVS region, which is type E820_NVS (not > E820_RESERVED), so e820_reserve_resources() reserves it as > IORESOURCE_BUSY. My guess is that Huang tested this on machines where > the EINJ/ERST registers are in "reserved" regions, not ACPI NVS > regions. The "reserved" regions are not marked IORESOURCE_BUSY. > > Huang, when you fix this, please include something like the following > (mangled) patch so the error message is more consistent with other > resource messages. The patch looks good. Can you resubmit it with changelog? > Could you also remove the ERST/EINJ/HEST "Table is not found" > messages? As far as I can tell, these tables are optional, and > printing the message is confusing to users, e.g., > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/599715 Yes. This seems confusing to them. I will change this. Best Regards, Huang Ying -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
