On 06/29/2018 10:39 AM, Fenghua Yu wrote: > On Fri, Jun 29, 2018 at 10:29:08AM -0700, Dave Hansen wrote: >> On 06/29/2018 10:16 AM, Fenghua Yu wrote: >>> On Fri, Jun 29, 2018 at 09:33:54AM -0700, Luck, Tony wrote: >>>>>> + WARN_ONCE(1, "A split lock issue is detected. Please FIX it\n"); >>>>> But, warning here is also not super useful. Shouldn't we be dumping out >>>>> the info in 'regs' instead of the current context? We don't care about >>>>> the state in the #AC handler, we care about 'regs'. >>> But WARN dump not only the state in the #AC handler, but also dump the regs >>> in the current context. And WARN dumps stack. >> Oh, I forgot about the fancy stack following. That might give us useful >> output, although mixed with useless output about the #AC handler. > The useful split lock info follows useless #AC handler info.
Can we do better than this? Why don't I see the page fault stack in oopses that result in page fault, for instance?
