• Christoph Lameter's avatar
    Safer nr_node_ids and nr_node_ids determination and initial values · 476f3534
    Christoph Lameter authored
    The nr_cpu_ids value is currently only calculated in smp_init.  However, it
    may be needed before (SLUB needs it on kmem_cache_init!) and other kernel
    components may also want to allocate dynamically sized per cpu array before
    smp_init.  So move the determination of possible cpus into sched_init()
    where we already loop over all possible cpus early in boot.
    Also initialize both nr_node_ids and nr_cpu_ids with the highest value they
    could take.  If we have accidental users before these values are determined
    then the current valud of 0 may cause too small per cpu and per node arrays
    to be allocated.  If it is set to the maximum possible then we only waste
    some memory for early boot users.
    Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
page_alloc.c 91.1 KB