Description of problem: The problem occurs in network install of Fedora 9 Beta on a Phenom box with GigaByte GB-MA770-DS3 motherboard. After selecting more or less default options (logs will be attached), the installation gets into the package download and install stage. After downloading a few packages it stops to a crawl, package fetch errors start to occur and <3>PCI-DMA: Out of IOMMU space for 1536 bytes at device 0000:02:00.0 is repeatedly printed to console (1536 looks like the Ethernet frame size). The network seems to sort of work even afterwards and the install would probably complete, except that it might take a few weeks. How reproducible: Always. Steps to Reproduce: Attempt a network install of Fedora 9 Beta on GA-MA770-DS3 box. Additional info: This might be related to bug 278721, though the motherboard is quite different. The logs again contain Please enable the IOMMU option in the BIOS setup The BIOS has no such option (did try Ctrl-F1). Also, the log contains some confusing messages about AGP -- even though the board has no AGP port and the BIOS does not have a single AGP related setting.
Created attachment 304186 [details] Anaconda log
Created attachment 304188 [details] syslog
Can you try adding "iommu=memaper=3" to the kernel boot options and see if that helps?
Adding iommu=memaper=3 indeed helps, I no longer get `out of IOMMU space' and the installation seem to complete normally, thanks.
Well, now the story continues as in bug 278721. After a cold boot (with kernel-2.6.25-0.234.rc9.git1.fc9.x86_64) I get Aperture beyond 4GB. Ignoring. Your BIOS doesn't have a aperture memory hole Please enable the IOMMU option in the BIOS setup This costs you 256 MB of RAM after Booting the kernel. The 256 MB of lost memory is caused by me adding iommu=memaper=3 to the kernel line. After removing it, the amount decreases to 64 MB.
You can also try using 2 instead of 3 and get 128MB. But why a system BIOS would move the aperture on warm boot vs. cold like in the other report I don't know... did you try warm-booting to see if the error goes away?
Changing version to '9' as part of upcoming Fedora 9 GA. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
After some more experimentation... Fedora 9 (final) installation no longer requires passing iommu=memaper=3. The aperture issue after installation remains. My original observation seems to be wrong, though. The only difference between cold and warm boot is the first line of the lost-memory message: Cold boot: Aperture beyond 4B. Ignoring. Warm boot: Aperture pointing to e820 RAM. Ignoring.
The same problem is with my GA-MA790FX-DQ6. The last working kernel (without Out of IOMMU space error) is 2.6.24.7-92.fc8. I haven't tried iommu=memaper=3 parameter with newer kernels yet. Quite the same config (but there is X2 processor, not Phenom) works without probs under F9 kernels, although on both machines are the problems with aperture issue.
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Due to boot changes I can no longer spot the message during boot in F11, but dmesg still reads (with kernel-2.6.29.4-167.fc11.x86_64): ... Checking aperture... No AGP bridge found Node 0: aperture @ 20000000 size 32 MB Aperture pointing to e820 RAM. Ignoring. Your BIOS doesn't leave a aperture memory hole Please enable the IOMMU option in the BIOS setup This costs you 64 MB of RAM Mapping aperture over 65536 KB of RAM @ 20000000 ... and AFICT it indeed costs me 64 MB of RAM.
Pretty sure this is fixed, reopen the bug if it's still a problem.