On Wed, 18 Jun 2014, Paul E. McKenney wrote: > > I agree that it might work nicely for RCU stall detector indeed. I was > > looking for solution that'd work nicely both for RCU and for sysrq-l > > (where we can't rely on processess being stuck in any way). > > Agreed. And if some more generally useful approach appears, I will be > quite happy to adjust RCU to use it. In the meantime, I expect that > my patch will be helpful.
Agreed. And we'll look into fixing sysrq-l in parallel I guess; once there is a working solution (hangs with sysrq-l can be trivially reproduced almost immediately), we can then migrate RCU to it. Still, I feel bad about the fact that we are now hostages of our printk() implementation, which doesn't allow for any fixes/improvements. Having the possibility to printk() from NMI would be nice and more robust ... otherwise, we'll be getting people trying to do it in the future over and over again, even if we now get rid of it at once. 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/
