Messages in this thread | | | Subject | Re: [2.6.30-rcX] Some ftrace debug option is consuming memory? | From | Tetsuo Handa <> | Date | Wed, 27 May 2009 12:06:24 +0900 |
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Hello.
Steven Rostedt wrote: > I should have noticed this before. I bet if you disable the branch tracers > you will boot again. The branch tracers makes a table of _all_ branches in > the kernel. But the change we did between 29 and 30 is that we also make > it per cpu. On big boxes the cache line hits were so bad that the > interrupts would take so long that they would live lock the machine. > > You configured 2 CPUS so you doubled the size of that table. > > To test if this is your issue you can try changing NR_CPUS to 1, or just > disabled the BRANCH_PROFILERs.
I disabled CONFIG_TRACE_BRANCH_PROFILING and it boots now.
# diff config-2.6.30-rc7-ng .config 4c4 < # Mon May 25 13:28:39 2009 --- > # Wed May 27 11:52:49 2009 1546,1549c1546 < CONFIG_TRACE_BRANCH_PROFILING=y < CONFIG_PROFILE_ALL_BRANCHES=y < CONFIG_TRACING_BRANCHES=y < CONFIG_BRANCH_TRACER=y --- > # CONFIG_TRACE_BRANCH_PROFILING is not set
Thank you.
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