On Sat, 21 Feb 2015, Ingo Molnar wrote: > > Plus a lot of processes would see EINTR, causing more havoc. > > Parking threads safely in user mode does not require the propagation of > syscall interruption to user-space.
BTW how exactly do you envision this will work? Do I understand your proposal correctly that EINTR will be "handled" somewhere in the "live patching special signal handler" and then have the interrupted syscall restarted? Even without EINTR propagation to userspace, this would make a lot of new syscall restarts that were not there before, and I am still to be convinced that this is something we are not going to cause a lot of new user-visible breakage with. Yes, the breakage would be caused kernel bugs (I mostly envision drivers to be problematic in this area) that would be nice to have fixed, but the user experience that will come out of it will be just completely horrible. Or did I misunderstand what you are really proposing? Thanks, -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
