On Fri, Nov 06, 2009 at 07:03:23AM +0100, Tobias Diedrich wrote: > Mel Gorman wrote: > > [No BZ ID] Kernel crash on 2.6.31.x (kcryptd: page allocation failure..) > > This apparently is easily reproducible, particular in comparison to > > the other reports. The point of greatest interest is that this is > > order-0 GFP_ATOMIC failures. Sven, I'm hoping that you in particular > > will be able to follow the tests below as you are the most likely > > person to have an easily reproducible situation. > > I've also seen order-0 failures on 2.6.31.5: > Note that this is with a one process hogging and mlocking memory and > min_free_kbytes reduced to 100 to reproduce the problem more easily. > Is that a vanilla, with patches 1-3 applied or both? > I tried bisecting the issue, but in the end without memory pressure > I can't reproduce it reliably and with the above mentioned pressure > I get allocation failures even on 2.6.30.o > To be honest, it's not entirely unexpected with min_free_kbytes set that low. The system should cope with a certain amount of pressure but with pressure and a low min_free_kbytes, the system will simply be reacting too late to free memory in the non-atomic paths. -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
