On Sun, 2008-06-15 at 21:46 -0400, Joseph Fannin wrote: > Hello! > > I'm reproducably hitting a BUG() in Linus' git (current as of about > noon, Sunday 15, GMT -0500) on my Beige PowerMac G3 (32bit, natch). > The line indicted in the (hand-copied) traceback that follows is: > > BUG_ON(!pte_none(*pte)); > > ...in __dma_alloc_coherent().
.../... > [ 261.043131] ------------[ cut here ]------------ > [ 261.044194] kernel BUG at arch/powerpc/lib/dma-noncoherent.c:209! I wonder how you end up hitting code in dma-noncoherent.c in the first place ! PowerMac kernels should not have that code compiled in at all... Ben. > [ 261.045605] Oops: Exception in kernel mode, sig: 5 [#1] > [ 261.046804] PREEMPT SMP NR_CPUS=2 PowerMac > [ 261.047834] Modules linked in: > [ 261.048584] NIP: c001db58 LR: c001db18 CTR: 00000000 > [ 261.049730] REGS: df82bbf0 TRAP: 0700 Not Tainted > (2.6.26-rc6-2008061501) > [ 261.051344] MSR: 00029032 <EE,ME,IR,DR> CR: 22008084 XER: 20000100 > [ 261.053111] TASK = df830000[1] 'swapper' THREAD: df82a000 CPU: 0 > [ 261.054528] GPR00: fe5575a9 df82bca0 df830000 c1ce21b8 00000001 ffffffff > c001da6c c047fbec > [ 261.056831] GPR08: c0420000 00000001 ff102000 fe5575a8 22008028 00c570a8 > 00000000 00000000 > [ 261.059133] GPR16: 00000000 00000000 c0370000 c03f0000 c0470408 c0420000 > c0420000 c03f0000 > [ 261.061438] GPR24: c1ce2170 dddae4e0 c03f70a8 00000001 00002000 cfefe400 > c1ce2170 df82bca0 > [ 261.179520] NIP [c001db58] __dma_alloc_coherent+0x214/0x300 > [ 261.238707] LP [c001db18] __dma_alloc_coherent+0x1d4/0x300 > [ 261.297574] Call Trace: > [ 261.355523] [df82bca0] [c001daf8] __dma_alloc_coherent+0x1b4/0x300 > (unreliable) > [ 261.415029] [df82bce0] [c02ee33c] pmac_ide_init_dma+0x64/0xb4 > [ 261.474513] [df82bd00] [c021d5do] ide_device_add_all+0x13c/0x5f8 > [ 261.534160] [df82bd40] [c021db00] ide_device_add+0x74/0x98 > [ 261.593301] [df82bd60] [c02ee044] pmac_ide_setup_device+0x230/0x4c4 > [ 261.652385] [df82bdc0] [c02ee6c0] pmac_ide_macio_attach+0x138/0x260 > [ 261.710810] [df82be30] [c020afc4] macio_device_probe+0x60/0x8c > [ 261.769060] [df82be50] [c0202fbc] driver_probe_device+0xbc/0x1f8 > [ 261.827081] [df82be70] [c0203184] __driver_attach+0x8c/0x90 > [ 261.885331] [df82be90] [c02023ac] bus_for_each_dev+0x60/0xa0 > [ 261.943311] [df82bec0] [c0202da0] driver_attach+0x2c/0x44 > [ 262.000900] [df81bed0] [c0202a8c] bus_add_driver+0x1e8/0x260 > [ 262.115012] [df82bf20] [c020ae4c] macio_register_driver+0x30/0x48 > [ 262.171573] [df82bf30] [c03e03ac] pmac_ide_probe+0x70c/0x90 > [ 262.227458] [df82bf50] [c03b238c] kernel_init+0x160/0x35c > [ 262.283239] [df82bff0] [c001583c] kernel_thread+0x44/0x60 > [ 262.339020] Instruction dump: > [ 262.393886] 61298e39 7c00c050 7c001670 7c0049d6 812b523c 54006026 > 7c004a14 90140000 > [ 262.450107] 001d0000 540007fa 3160ffff 7d2b0110 <0f090000> 38000400 > 7d60f028 7d6b0378 > [ 262.511341] ---[ end trace 2d8bb0493664c3b8 ]--- > [ 262.566638] Kernel panic - not syncing: Attempted to kill init! > > > This is 100% reproducable. I can't really recall the last kernel I > built and booted successfully on this box -- the best I can say is > that the 2.6.24-ish kernel Ubuntu ships works. > > I should probably mention that I've been having a little trouble with > the IDE drive in this machine -- but the drive isn't the problem: > > * This is 100% reproducible with the current git kernel, and > doesn't happen w/the Ubuntu kernel > * The traceback and dump does not vary between boots > * The kernel BUGs out well before the disks are detected (and it's > a _drive_ problem) > > ... etc. :-) I don't want to send anyone on a wild goose chase, but > yeah, it's not the hardware. ;-) > > So, what can I do to help find the problem here? Git says no one's > touched that file in a while, and tracing through this problem is > above my skill level here. I'll attach my .config, and put the > vmlinux up: > > http://jfannin.oxyhost.com/vmlinux > > I can try to get more of the kernel messages, if that's likely to > help. Bisecting will take some time, but if that's what's necessary, > let me know. > > Thanks for any help. > > -- > Joseph Fannin > [EMAIL PROTECTED] > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-dev _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
