• Anton Blanchard's avatar
    [PATCH] ppc64: restore smt-enabled=off kernel command line option · a96ca8b1
    Anton Blanchard authored
    Restore the smt-enabled=off kernel command line functionality:
    
    - Remove the SMT_DYNAMIC state now that smt_snooze_delay allows for the
      same thing.
    - Remove the early prom.c parsing for the option, put it into an
      early_param instead.
    - In setup_cpu_maps honour the smt-enabled setting
    
    Note to Nathan: In order to allow cpu hotplug add of secondary threads after
    booting with smt-enabled=off, I had to initialise cpu_present_map to
    cpu_online_map in smp_cpus_done.  Im not sure how you want to handle this but
    it seems our present map currently does not allow cpus to be added into the
    partition that werent there at boot (but were in the possible map).
    Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    a96ca8b1
naca.h 1.89 KB