Messages in this thread | | | Date | Thu, 2 Apr 2015 11:23:17 -0500 | From | Aravind Gopalakrishnan <> | Subject | Re: [PATCH] x86, aperture: Check for GART before accessing GART registers |
| |
On 4/2/2015 11:06 AM, Ingo Molnar wrote: > > > We get "AGP:" messages on kernel logs like this- > [ 0.000000] AGP: Node 0: aperture [bus addr 0x00000000-0x01ffffff] (32MB) > [ 0.000000] AGP: Your BIOS doesn't leave a aperture memory hole > [ 0.000000] AGP: Please enable the IOMMU option in the BIOS setup > [ 0.000000] AGP: This costs you 64MB of RAM > [ 0.000000] AGP: Mapping aperture over RAM [mem 0xd4000000-0xd7ffffff] > (65536KB) > > These are just noise on processors which have no GART. > agreed. > >> We can avoid calling allocate_aperture() and would not have to >> memblock_reserve() 64MB of RAM. >> Also, we can avoid having to loop through all PCI buses, devices (twice) >> searching for AGP bridge if we bail out early. > Makes sense. Mind adding this info to the changelog and resend? > >
Sure, will do that and resend.
Thanks, -Aravind.
| |