On Tue, May 19, 2015 at 01:27:07PM +1000, Michael Ellerman wrote: > On Mon, 2015-05-18 at 14:29 +0200, Jiri Kosina wrote: > > > > ftrace already handles recursion protection by itself (depending on the > > per-ftrace-ops FTRACE_OPS_FL_RECURSION_SAFE flag). > > OK, so I wonder why that's not working for us?
IIRC a data access fault happens just before that flag is looked at ;-) I'm now thinking about a hybrid solution: mark the most critical functions "notrace", especially those directly involved with MMU loading, and add a per-thread flag to catch the not-so-obvious cases. Torsten _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev