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?
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check-bugs.patch
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