On Wed, 24 Jul 2013, H. Peter Anvin wrote: > > Commit-ID: 17f41571bb2c4a398785452ac2718a6c5d77180e > > Gitweb: > > http://git.kernel.org/tip/17f41571bb2c4a398785452ac2718a6c5d77180e > > Author: Jiri Kosina <jkos...@suse.cz> > > AuthorDate: Tue, 23 Jul 2013 10:09:28 +0200 > > Committer: Ingo Molnar <mi...@kernel.org> > > CommitDate: Tue, 23 Jul 2013 10:12:57 +0200 > > > > kprobes/x86: Call out into INT3 handler directly instead of using notifier > > > > In fd4363fff3d96 ("x86: Introduce int3 (breakpoint)-based > > instruction patching"), the mechanism that was introduced for > > notifying alternatives code from int3 exception handler that and > > exception occured was die_notifier. > > > > This is however problematic, as early code might be using jump > > labels even before the notifier registration has been performed, > > which will then lead to an oops due to unhandled exception. One > > of such occurences has been encountered by Fengguang: > > > > Please note that putting this patch in perf/core means x86/jumplabel is > completely nonfunctional by itself.
I'd like to point out that this is still the case ... TIA, -- 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/
