On Thu, Sep 3, 2015 at 4:45 AM, Peio <peio@xxxxxxxxxxx> wrote: > Peio <peio <at> azkarate.eu> writes: > >> >> Yinghai Lu <yinghai <at> kernel.org> writes: >> >> > boot with pci=nocrs ? >> > >> > Try to get BIOS update. >> > >> > > If I change BIOS parameters I'll need a fresh install or the actual > kernel >> > > reconigzes changes?. >> > should not. >> > >> >> I'll try pci=nocrs and BIOS update. >> Thank you Yinghai. >> >> > I solved the issue. > > 1.- Boot kernel with pci=nocrs parameter (linux assigns lot of memory ro pci > root bus). > > 2.- Remove upstream bridge : > sudo echo 1 > /sys/bus/pci/devices/0000:00:1c.0/remove > > 3.- Rescan PCI bus > sudo echo 1 > /sys/bus/pci/rescan This is a workaround, not a solution. It is not safe to use "pci=nocrs" in general because it can break things related to resource assignment, including hot-add of new devices. I haven't looked at the problem in detail, but if the BIOS gives us a _CRS with host bridge windows that are too small to accommodate all your devices, there's really nothing the kernel can do about it. You just have to regard it as a limitation of that platform. Bjorn -- 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
