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. 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 Bjorn diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c index 8041248..6f97b59 100644 --- a/drivers/acpi/apei/apei-base.c +++ b/drivers/acpi/apei/apei-base.c @@ -460,9 +460,9 @@ int apei_resources_request(struct apei_resources *resources, desc); if (!r) { pr_err(APEI_PFX - "Can not request iomem region <%016llx-%016llx> for GARs.\n", + "can not request [mem %#010llx-%#010llx] for %s registers\n", (unsigned long long)res->start, - (unsigned long long)res->end); + (unsigned long long)res->end, desc); res_bak = res; goto err_unmap_iomem; } @@ -472,9 +472,9 @@ int apei_resources_request(struct apei_resources *resources, r = request_region(res->start, res->end - res->start, desc); if (!r) { pr_err(APEI_PFX - "Can not request ioport region <%016llx-%016llx> for GARs.\n", + "can not request [io %#06llx-%#06llx] for %s registers\n", (unsigned long long)res->start, - (unsigned long long)res->end); + (unsigned long long)res->end, desc); res_bak = res; goto err_unmap_ioport; } -- 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
