> On Wed, 21 Jul 2010, KOSAKI Motohiro wrote: > > > > This patch adds trace points to mmap, munmap, and brk that will report > > > relevant addresses and sizes before each function exits successfully. > > > > > > Signed-off-by: Eric B Munson <emunson@xxxxxxxxx> > > > > I don't think this is good idea. if you need syscall result, you should > > use syscall tracer. IOW, This tracepoint bring zero information. > > > > Please see perf_event_mmap() usage. Our kernel manage adress space by > > vm_area_struct. we need to trace it if we need to know what kernel does. > > > > Thanks. > > The syscall tracer does not give you the address and size of the mmaped areas > so this does provide information above simply tracing the enter/exit points > for each call. Why don't you fix this? > perf_event_mmap does provide the information for mmap calls. Originally I sent > a patch to add a trace point to munmap and Peter Z asked for corresponding points > in the mmap family. If the consensus is that the trace point in munmap is the > only one that should be added I can resend that patch. > > -- > Eric B Munson > IBM Linux Technology Center > ebmunson@xxxxxxxxxx > -- 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>