On Fri, Feb 15, 2013 at 04:09:40PM +0100, Oleg Nesterov wrote: > On 02/15, Cyrill Gorcunov wrote: > > > > > strace needs to get that data on every syscall entry in the traced > > > process. > > > Doing open/read/close on every syscall entry is going to slow it down a > > > lot. > > > > Don't you need to read it only once when strace is attached? Compat flag > > can't > > be arbitrary dropped when program executes, no? > > TS_COMPAT is set/cleared every time a 64bit task does int80. > > I guess you need TIF_IA32, not TS_COMPAT, for c/r.
Yeah, indeed. Still if there will be a metadata in registers set, this will be even better I think. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
