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.
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