2008/12/13 Frédéric Weisbecker <fweisbec@xxxxxxxxx>: > 2008/12/13 Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>: >> Steven, is it possible to trigger tracing for any function when a >> function in the list set up by the user is running and then stop tracing >> when it exits? >> >> - Arnaldo >> > > Hi Arnaldo, > > Yes it's possible with ftrace, by using the function graph tracer ( an > ftrace extension that adds the tracing on return). > > To enable it just do: > echo function_graph > /debugfs/tracing/current_tracer > > And to trace by choosing a particular function as the root of the call > stack, just do the things > explained on this patch: > http://git.kernel.org/?p=linux/kernel/git/mingo/linux-2.6-sched-devel.git;a=commit;h=ea4e2bc4d9f7370e57a343ccb5e7c0ad3222ec3c > > And the tracing will finish after this function returns :-) > I forgot to say that add-on is not yet included on 2.6.28 This will be available for 2.6.29. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
