* Pekka Enberg <penberg@xxxxxxxxxx> wrote: > On Thu, Mar 24, 2011 at 4:41 PM, Christoph Lameter <cl@xxxxxxxxx> wrote: > > On Thu, 24 Mar 2011, Ingo Molnar wrote: > > > >> FYI, some sort of boot crash has snuck upstream in the last 24 hours: > >> > >> BUG: unable to handle kernel paging request at ffff87ffc147e020 > >> IP: [<ffffffff811aa762>] this_cpu_cmpxchg16b_emu+0x2/0x1c > > > > Hmmm.. This is the fallback code for the case that the processor does not > > support cmpxchg16b. > > How does alternative_io() work? Does it require > alternative_instructions() to be executed. If so, the fallback code > won't be active when we enter kmem_cache_init(). Is there any reason > check_bugs() is called so late during boot? Can we do something like > the totally untested attached patch? Does the config i sent you boot on your box? I think the bug is pretty generic and should trigger on any box. Thanks, Ingo -- 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=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>