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Date: Thu, 21 Oct 2010 16:44:28 +0800 From: "Figo.zhang" <zhangtianfei@...dcoretech.com> To: Yong Zhang <yong.zhang0@...il.com> Cc: Li Zefan <lizf@...fujitsu.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Steven Rostedt <srostedt@...hat.com> Subject: Re: Ftrace: can trace kthread? > > i try by set_ftrace_pid, it also can't ftrace the kswapd. > > Are you sure kswapd got chance to run on your system? > > BTW, I can successfully trace bdi_writeback_thread, > # tracer: function > # > # TASK-PID CPU# TIMESTAMP FUNCTION > # | | | | | > flush-8:0-374 [000] 600743.828496: finish_task_switch <-schedule > flush-8:0-374 [000] 600743.828498: perf_event_task_sched_in > <-finish_task_switch > flush-8:0-374 [000] 600743.828498: del_timer_sync <-schedule_timeout > flush-8:0-374 [000] 600743.828499: try_to_del_timer_sync > <-del_timer_sync > flush-8:0-374 [000] 600743.828499: lock_timer_base > <-try_to_del_timer_sync > flush-8:0-374 [000] 600743.828499: _spin_lock_irqsave <-lock_timer_base > flush-8:0-374 [000] 600743.828500: _spin_unlock_irqrestore > <-try_to_del_timer_sync > flush-8:0-374 [000] 600743.828500: kthread_should_stop > <-bdi_writeback_task are you use my scprit to trace the bdi_writeback_thread ? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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