On Sat, Jun 06, 2009 at 05:27:49AM -0700, Roland McGrath wrote: >I reproduced what jwb reported on the powerstation. >Mine is with F10 + updates userland, only the kernel seems to matter. >The test case is: > > # modprobe iscsi_tcp > Illegal Instruction > # > >On -16[278], same oops that jwb saw, wrong text appearing at a page boundary. > >This kernel: >http://kojipkgs.fedoraproject.org/scratch/roland/task_1396640/kernel-vanilla-2.6.29.4-168.fc11.ppc64.rpm > >does not exhibit the problem. That should be all the same buildroot stuff, >and 2.6.29.4 with no extra patches. > >OTOH, this kernel: >http://kojipkgs.fedoraproject.org/scratch/roland/task_1396192/kernel-2.6.29.4-167.fc10.ppc64.rpm > >also does not exibit the problem. That is normal -167 with all the same >patches, but built in dist-f10-updates-candidate buildroots. > >But contrary to jwb's reports: >On my powerstation 2.6.29.3-159.fc11.ppc64 fails to boot: That's not contrary. We were testing on different machines. I was testing on a Apple PowerMac7,2 (dual ppc970 G5) which uses sata_swv for storage, not ipr. >This is obviously a variant of the same problem. Right. >It's losing on clobbered instructions at a page boundary. Yes, seems so. >Man but these bastards boot slow. I've noticed that about the powerstation, yes. The G5 boots surprisingly quick with F11. Go figure. >Oh, and note the two variant crashes in different kernels are in different >routines in different builds, but always at PC 0xc000000000400000, >and always clobbered the next few words with: > 00001010 00000008 00001013 0000000f > >The magic PAGE_OFFSET+4MB effect. So, youse gots to wonder, and... > >On 2.6.29.3-142.fc11.ppc64, which has "no problem", I built the appended module. >It printed this: > >Instruction dump: >e8090000 f8410028 7f83e378 e9690010 7fa5eb78 7c0903a6 e8490008 4e800421 ><00001010> 00000008 00001013 0000000f 7961626f 6f740000 00101600 00000c00 > ^^^^^^^^ ^^^^ <-- spells "yaboot" >00000400 00101100 00000800 7fa3eb78 4bfff24d 60000000 38600000 383f00b0 > ^^^^^^^^ <-- goes to correct text again from here > >The magic 44 bytes of bogon at PAGE_OFFSET+4MB effect. >We have no idea how long we have been screwed. > >I updated to yaboot-1.3.14-12.fc11.ppc (was f10), ran ybin, no help. ybin isn't needed on the powerstation iirc. Anyway, that is indeed odd. We should have Tony take a look at this if possible. Or if David can remeber how to do a netboot directly from OF (and skipping yaboot), that would be a good test too. josh _______________________________________________ Fedora-kernel-list mailing list Fedora-kernel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-kernel-list
