Am 02.04.2013 12:48, schrieb Mel Gorman: > On Tue, Apr 02, 2013 at 09:24:51AM +0200, Stefan Priebe - Profihost AG wrote: >> Hello list, >> >> i was trying to play with the new NUMA autobalancing feature of Kernel 3.8. >> >> But if i enable: >> CONFIG_ARCH_USES_NUMA_PROT_NONE=y >> CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=y >> CONFIG_NUMA_BALANCING=y >> >> i see random process crashes mostly in libc using vanilla 3.8.4. >> > > Any more details than that? What sort of crashes? Anything in the kernel > log? Any particular pattern to the crashes? Any means of reliably > reproducing it? 3.8 vanilla, 3.8-stable or 3.8 with any other patches > applied? Sorry for missing information. > Any more details than that? Sadly not i just see a crash line in the kernel log - see below. > What sort of crashes? Mostly the processes just die but i've also seen processes consuming 100% CPU all the time or even just doing nothing anymore. > Anything in the kernel log? Three examples: pigz[10194]: segfault at 0 ip (null) sp 00007f6197ffed50 error 14 in pigz[400000+e000] rbd[2811]: segfault at b8 ip 00007f73c2d51b9e sp 00007f73bcae3b40 error 4 in librados.so.2.0.0[7f73c2afe000+3b9000] rbd[1805]: segfault at 0 ip 00007f60c28dceb4 sp 00007f60b7ffd1f8 error 4 in ld-2.11.3.so[7f60c28cc000+1e000] > Any particular pattern to the crashes? Any means of reliably > reproducing it? No i just need to run some task and after some time they die or hang forever. I have this on 10 different E5-2640 and also on E56XX. I can "fix" this by: 1.) putting all memory to just ONE CPU 2.) Disable NUMA Balancing > 3.8 vanilla, 3.8-stable or 3.8 with any other patches > applied? 3.8.4 without any patches. Greets, Stefan -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>