On Fri, Dec 18, 2009 at 02:11:40AM +0100, Oleg Nesterov wrote: > The patch adds the new file, kernel/ptrace-utrace.c, which contains > the new implementation of ptrace over utrace. > > This file is not compiled until we have CONFIG_UTRACE option, will be > added by the next "utrace core" patch. > > It's supposed to be an invisible implementation change, nothing should > change to userland when CONFIG_UTRACE is enabled. > > Signed-off-by: Roland McGrath <rol...@redhat.com> > Signed-off-by: Oleg Nesterov <o...@redhat.com> > ---
Oleg, ptrace/utrace performs better with the ptrace-tests [1] testsuite (1 failure vs. 3 with vanilla ptrace [1]). The gdb testsuite also has no regressions. In fact, the results on the gdb testsuite are identical. Ananth [1] http://sourceware.org/systemtap/wiki/utrace/tests [2] detach-stopped and stopped-attach-transparency are the additional failures. syscall-reset fails in both cases.
