On Sun, 2013-12-29 at 21:43 +0100, John Paul Adrian Glaubitz wrote: > On 12/29/2013 08:41 PM, Ben Hutchings wrote: > >> "/sgiroot splash=silent showopts stop_machine.lazy=1 add_efi_memmap > >> nortsched processor.max_cstate=1 nobau log_buf_len=8M kdb=on > >> cgroup_disable=memory earlyprintk=ttyS0,115200n8 pcie_aspm=on nohz=off > >> crashkernel=512M intel_iommu=off init=/sbin/bootcpuset > > > > This is an interesting init command. Does it set CPU affinity and then > > invoke the 'real' init? > > Yes, according to the documentation it seems to do exactly that [1]. > > >> Any idea? > > [...] > > > > I know that stop_machine used to be very slow indeed on large systems, > > and was used in too many places, and both of these problems have been > > addressed over the last few years. Have you tested with a more recent > > kernel version from unstable? > > Last kernel I tested was 3.11. I am testing with 3.12-1-amd64 from > unstable now which I could install it by temporarily disabling NUMAlink. > > So far, the machine seems stuck again, unfortunately. There also > is no output on the serial console whatsoever which puzzles me since > last time I could at least see the message about the kernel being > decompressed. [...]
The earlyprintk kernel parameter may be useful.
Ben.
--
Ben Hutchings
Klipstein's 4th Law of Prototyping and Production:
A fail-safe circuit will destroy others.
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