Hello, I've been wanting this for a while to improve overall futex testing. I must say that I checked rather late when I was nearly finished with patch 2 if something similar for futexes had already been proposed. Sure enough, in 2009 this was discussed[1].
Coincidently, I also took the natural approach of making use of our fault-injection machinery. I have no idea if perf nowadays does such things, and if it does not, I honestly don't have the bandwidth to do it Ingo's preferred way -- when there is nothing wrong with this approach, imho (0 overhead). Anyway, here's a working patch. Patch 1 is merely a trivial add-on. [1]: https://lwn.net/Articles/364742/ Thanks! Davidlohr Bueso (2): futex: Enhance comments in futex_lock_pi() for blocking paths futex: Fault/error injection capabilities Documentation/fault-injection/fault-injection.txt | 11 +++ kernel/futex.c | 100 +++++++++++++++++++++- lib/Kconfig.debug | 7 ++ 3 files changed, 114 insertions(+), 4 deletions(-) -- 2.1.4 -- 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/
