On Wed, Apr 29, 2015 at 9:27 PM, Trevor Cordes <tre...@tecnopolis.ca> wrote: > Sorry for the top-posting; Josh Boyer suggested I re-mail this mail > from last month which didn't get any replies. I'm still having this > weird kernel bug affecting me and I've bisected it down to like 2-4 > lines of code. (I've thought more about my theory regarding > unsigned/signed below and it's probably wrong, so ignore my > prognosticating.) Please see my rhbz link near the bottom for the full > details.
Thanks so much for the report and all the effort to chase down this regression! >From your description it does seem like some sort of edge case problem w/ the 32bit ktime_divns(), but I don't see it right off, and I agree with Alan to do both calculations and print out warn when that happens. There's also not a ton of users of that function, but ktime_us_delta() is used in drivers/media/rc/ir-lirc-codec.c, which makes use of it in ir_lirc_transmit_ir(). We should instrument that to see if its calculating negative deltas. I'll send you a debug patch to do the above. thanks -john -- 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/
