Messages in this thread | | | Date | Wed, 9 Dec 2009 16:52:36 +0800 | Subject | Re: [RFC PATCH] Add TRACE_IRQFLAGS_SUPPORT, LOCKDEP_SUPPORT then enable ftrace for ia64 | From | Luming Yu <> |
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On Wed, Dec 9, 2009 at 2:45 PM, Luming Yu <luming.yu@gmail.com> wrote: >> >> But let me try more on other ia64 boxes that I can get access. >> >> Stay tuned. > > I might have reproduced the problem on a HP ia64 system > with -32 kernel as the following info. But -31 kernel with > lockdep code enabled just works. ....debugging...
ah, I seem to have found the change in -32 against -31 that causes the trouble.
Commenting out the change make -32 Lockdep kernel boot.
Tony, please let me know whether you can reproduce..
kernel/lockdep.c static int save_trace(struct stack_trace *trace) { trace->nr_entries = 0; trace->max_entries = MAX_STACK_TRACE_ENTRIES - nr_stack_trace_entries; trace->entries = stack_trace + nr_stack_trace_entries;
trace->skip = 3;
save_stack_trace(trace); #if 0
/* * Some daft arches put -1 at the end to indicate its a full trace. * * <rant> this is buggy anyway, since it takes a whole extra entry so a * complete trace that maxes out the entries provided will be reported * as incomplete, friggin useless </rant> */ if (trace->entries[trace->nr_entries-1] == ULONG_MAX) trace->nr_entries--; #endif
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