On Thu, Mar 24, 2011 at 8:59 PM, Ingo Molnar <mingo@xxxxxxx> wrote: > > * Pekka Enberg <penberg@xxxxxxxxxx> wrote: > >> On Thu, Mar 24, 2011 at 8:47 PM, Christoph Lameter <cl@xxxxxxxxx> wrote: >> > >> > On Thu, 24 Mar 2011, Eric Dumazet wrote: >> > >> >> > this_cpu_cmpxchg16b_emu: >> >> > pushf >> >> > cli >> >> > >> >> > cmpq %gs:(%rsi), %rax >> > >> >> Random guess >> >> >> >> Masking interrupts, and accessing vmalloc() based memory for the first >> >> time ? >> > >> > Hmmm.. Could be. KVM would not really disable interrupts so this may >> > explain that the test case works here. >> > >> > Simple fix would be to do a load before the cli I guess. >> >> Btw, I tried Ingo's .config and it doesn't boot here so it's somehow >> .config related. > > did you get a similar early crash as i? I'd not expect my .config to have all > the drivers that are needed on your box. It hanged here which is pretty much expected on this box if kmem_cache_init() oopses. I'm now trying to see if I'm able to find the config option that breaks things. CONFIG_PREEMPT_NONE is a suspect: penberg@tiger:~/linux$ grep PREEMPT ../config-ingo # CONFIG_PREEMPT_RCU is not set CONFIG_PREEMPT_NONE=y # CONFIG_PREEMPT_VOLUNTARY is not set # CONFIG_PREEMPT is not set -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href