* Eran Liberty ([EMAIL PROTECTED]) wrote: > Steven Rostedt wrote: >> Eran Liberty wrote: >>> After compiling a kernel with ftrace I started to experience all sorts of >>> crashes. >> >> Just to make sure... >> >> ftrace enables markers too, and RCU has tracing with the markers. This may >> not be the problem, but I just want to eliminate as many variables as >> possible. >> Could you disable ftrace, but keep the markers on too. Also, could you >> enable ftrace again and turn on the FTRACE_STARTUP_TEST. > > for the fun of it I took out all my propriety modules; so now its a non > tainted kernel. > > Here is the matrix: > > !FTRACE x !MARKERS => stable > !FTRACE x MARKERS => stable > FTRACE x !MARKERS => n/a (FTRACE forces MARKERS) > FTRACE x MARKERS => unstable > FTRACE x FTRACE_STARTUP_TEST x MARKERS => unstable + tests passed > > Testing tracer sched_switch: PASSED > Testing tracer ftrace: PASSED > Testing dynamic ftrace: PASSED > > Oops: Exception in kernel mode, sig: 11 [#1] > Exsw1600 > Modules linked in: > NIP: c00bbb20 LR: c00bbb20 CTR: 00000000 > REGS: dd5b1c50 TRAP: 0700 Not tainted (2.6.27-rc2) > MSR: 00029000 <EE,ME> CR: 24082282 XER: 20000000 > TASK = ddcce060[1707] 'find' THREAD: dd5b0000 > GPR00: 00000000 dd5b1d00 ddcce060 dd801180 dd5b1d68 dd5b1d58 dd80125b > 100234ec > GPR08: c0800000 00019330 0000ffff dd5b1d20 24000288 100ad874 100936f8 > 1008a1d0 > GPR16: 10083f80 dd5b1e2c dd5b1d68 fffffff4 c0380000 dd5b1d60 dd5b1d58 > dd802084 > GPR24: dc3d7700 dd802018 dd5b1d68 c0380000 dd801180 dd5b1d68 00000000 > dd5b1d00 > NIP [c00bbb20] d_lookup+0x40/0x90 > LR [c00bbb20] d_lookup+0x40/0x90 > Call Trace: > [dd5b1d00] [dd5b1d58] 0xdd5b1d58 (unreliable)
Can you check if, at some point during the system execution (starting from boot), 0xdd5b1d58 is an address where a module is loaded ? (the module can be later unloaded, what I wonder is if this address would appear to have had a loaded+unloaded module). Actually, could you try to compile your kernel without "MODULE_UNLOAD" ? Mathieu > [dd5b1d20] [c00aebc4] do_lookup+0xe8/0x220 > [dd5b1d50] [c00b0a80] __link_path_walk+0x5a4/0xd54 > [dd5b1dc0] [c00b1288] path_walk+0x58/0xe0 > [dd5b1df0] [c00b13f8] do_path_lookup+0x78/0x13c > [dd5b1e20] [c00b20f4] user_path_at+0x64/0xac > [dd5b1e90] [c00a9028] vfs_lstat_fd+0x34/0x74 > [dd5b1ec0] [c00a90fc] vfs_lstat+0x30/0x48 > [dd5b1ed0] [c00a9144] sys_lstat64+0x30/0x5c > [dd5b1f40] [c0010554] ret_from_syscall+0x0/0x3c > Instruction dump: > 7c0802a6 bf61000c 3f60c038 7c3f0b78 90010024 7c7c1b78 7c9d2378 83db32a0 > 73c00001 7f83e378 7fa4eb78 4082002f <00000000> 2f830000 409e0030 801b32a0 > ---[ end trace 1eb8fd7adac2bb65 ]--- > > Liberty > > -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
