I just pulled from Linus and the Kernel I booted gave me this: | Freeing unused kernel memory: 152k init | BUG: sleeping function called from invalid context at /home/bigeasy/git/linux-2.6-powerpc/fs/exec.c:417 | in_atomic(): 0, irqs_disabled(): 1, pid: 1, name: swapper | Call Trace: | [ef831dd0] [c0007764] show_stack+0x48/0x154 (unreliable) | [ef831e00] [c002b4d0] __might_sleep+0x118/0x11c | [ef831e10] [c009bcfc] copy_strings+0x70/0x324 | [ef831e70] [c009bfd0] copy_strings_kernel+0x20/0x38 | [ef831e90] [c009d3b8] do_execve+0x15c/0x1ec | [ef831ec0] [c00084ac] sys_execve+0x58/0x84 | [ef831ee0] [c000f0e8] ret_from_syscall+0x0/0x3c | [ef831fa0] [c0001d68] init_post+0x54/0x174 | [ef831fc0] [c038a1c0] kernel_init+0xdc/0x104 | [ef831ff0] [c000ee68] kernel_thread+0x4c/0x68 | ------------[ cut here ]------------
It looks like userspace starts here. A bisect leads to |commit e5e774d8833de1a0037be2384efccadf16935675 |Author: Kumar Gala <ga...@kernel.crashing.org> |Date: Sat Dec 13 17:01:37 2008 -0600 | | powerpc/fsl-booke: Fix problem with _tlbil_va being interrupted | | An example calling sequence which we did see: | | copy_user_highpage -> kmap_atomic -> flush_tlb_page -> _tlbil_va | | We got interrupted after setting up the MAS registers before the | tlbwe and the interrupt handler that caused the interrupt also did | a kmap_atomic (ide code) and thus on returning from the interrupt | the MAS registers no longer contained the proper values. | | Since we dont save/restore MAS registers for normal interrupts we | need to disable interrupts in _tlbil_va to ensure atomicity. | | Signed-off-by: Kumar Gala <ga...@kernel.crashing.org> | |:040000 040000 1f298a8930bd2704f4481307f3d22589943bb5c0 7e3847dab748c332c8533111de32d23731ec778b M arch as the guilty commit. This box has highmem. Sebastian _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
