On 4/25/2011 10:26 AM, Johnny Hughes wrote: > On 04/25/2011 08:58 AM, Windsor Dave L. (AdP/TEF7.1) wrote: >> Just thought I'd pass along an error I received this weekend after >> upgrading two servers to 5.6. Both are HP Proliant DL380 servers >> running 64-bit, but one is a G6 model and one is a G7. After the >> upgrade and the reboot to the 2.6.18-238.9.1.el5 kernel, both servers >> displayed the following error at boot: >> "pci_mmcfg_init marking 256MB space uncacheable." >> >> Some Googling found me the following link: >> https://partner-bugzilla.redhat.com/show_bug.cgi?id=581933 >> >> There are apparently performance implications due to this issue. >> Fortunately, the solution is simple: just boot with the kernel parameter >> acpi_mcfg_max_pci_bus_num=on >> >> If everyone is already familiar with this, please ignore. :-) >> > > Supposedly this issue is fixed in the 5.6 kernel ... not introduced in it :D > > https://bugzilla.redhat.com/show_bug.cgi?id=581933 > > However, the advise is good regardless of version of kernel. > Yes, I saw the reference to RHEL 5.5 in the bug description, but I never saw the message before the upgrade to CentOS 5.6. Hardware differences, I guess. The bug description mentions a Dell Precision. Best Regards, Dave Windsor Robert Bosch LLC Team Leader, MES Database Infrastructure Group (AdP/TEF7.1) 4421 Highway 81 North Anderson, SC 29621 USA www.bosch.us