Messages in this thread |  | | | Date | Sat, 16 Oct 2004 10:18:56 +0200 | | From | Ingo Molnar <> | | Subject | Re: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U3 |
* Ingo Molnar <mingo@elte.hu> wrote:
> a suggestion for future testing: please enable PREEMPT_TIMING for the > next kernels you build, it will print such entries at the end of > stacktraces: > > preempt count: 2 > entry 1: cpu_idle+0x38/0x90 / (start_kernel+0x1ac/0x1f0) > entry 2: _spin_lock+0x22/0x80 / (timer_interrupt+0x1b/0x130)
correction: in -U3 you'll also need to enable LATENCY_TRACE for this to work. I've fixed this in my tree and from -U4 onwards the preemption trace will be maintained and printed if DEBUG_PREEMPT is enabled.
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