• Tejun Heo's avatar
    percpu: move region iterations out of pcpu_[de]populate_chunk() · a93ace48
    Tejun Heo authored
    Previously, pcpu_[de]populate_chunk() were called with the range which
    may contain multiple target regions in it and
    pcpu_[de]populate_chunk() iterated over the regions.  This has the
    benefit of batching up cache flushes for all the regions; however,
    we're planning to add more bookkeeping logic around [de]population to
    support atomic allocations and this delegation of iterations gets in
    the way.
    This patch moves the region iterations out of
    pcpu_[de]populate_chunk() into its callers - pcpu_alloc() and
    pcpu_reclaim() - so that we can later add logic to track more states
    around them.  This change may make cache and tlb flushes more frequent
    but multi-region [de]populations are rare anyway and if this actually
    becomes a problem, it's not difficult to factor out cache flushes as
    separate callbacks which are directly invoked from percpu.c.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
percpu-vm.c 10 KB