[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Re: Xen dom0 linux kernel 3.1 boot failure ptwr_emulate: could not get_page_from_l1e
I'm not sure if it was obvious, but yesterday I noticed that setting the "MPS table mode" to 'Disabled' actually made SMP stop working, i.e. the kernel only recognized a single CPU. This is of course not an option, so I enabled (set to 'Full Table APIC') the setting again and played around with my kernel config a bit. The kernel that crashed had CONFIG_X86_MPPARSE=y, and if I disable that, it boots fine (with SMP, and with the BIOS setting set to 'Full Table APIC'). So, I for one am quite happy now as I finally found a working configuration. But I'd still like to know if this is a hardware-specific issue, and/or a bug in Xen. Konrad Rzeszutek Wilk wrote, on 10/31/2011 03:08 PM: > Oh nice. What does you /proc/interrupts look like compared to > baremetal? While I was performing all my kernel tests, I saved the outputs of `dmesg` and `cat /proc/interrupts`. Sorry for attaching a tarball, but I'd like to give you as much information as possible. You'll probably only need the latest tests (#5 to #7), but just in case, I also included the others. Contents of the tarball: Baremetal tests: xen-hp/1/: MPS mode 'Full Table APIC', CONFIG_X86_MPPARSE=y, SMP working xen-hp/2/: MPS mode 'Full Table APIC', CONFIG_X86_MPPARSE=n, SMP working xen-hp/3/: MPS mode 'Disabled', CONFIG_X86_MPPARSE=y, SMP not working xen-hp/4/: MPS mode 'Disabled', CONFIG_X86_MPPARSE=n, SMP not working Xen tests: xen-hp/5/: MPS mode 'Disabled', CONFIG_X86_MPPARSE=n, SMP not working xen-hp/6/: MPS mode 'Full Table APIC', CONFIG_X86_MPPARSE=n, SMP working xen-hp/7/: MPS mode 'Full Table APIC', CONFIG_X86_MPPARSE=y, CRASHES (Therefore, #6 is the best working solution; #7 is what originally triggered the crash.) Thanks. Attachment:
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