* Eric B Munson <emunson@xxxxxxxxx> wrote: > Sorry for the long delay, the enter/exit routines are not compatible > with the information that these new trace points provides. When > tracing mmap, for instance, the addr and len arguments can be altered > by the function. If you use the enter/exit trace points you would not > see this as the arguments are sampled at function entrance and not > given again on exit. Also, the new trace points are only hit on > function success, the exit trace point happens any time you leave the > system call. Would it be feasible to use enter/exit information as the main source of events - and only add new tracepoints for the _missing_ information? (such as when mmap arguments change) Then user-space can combine the two. The new tracepoints would also carry useful information in themselves: they would show the cases where user-space did not get what it wished. (or so) Thanks, Ingo -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>