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    SubjectRe: [PATCH v9 06/12] mm: zero struct pages during initialization
    On Tue 03-10-17 11:22:35, Pasha Tatashin wrote:
    >
    >
    > On 10/03/2017 09:08 AM, Michal Hocko wrote:
    > > On Wed 20-09-17 16:17:08, Pavel Tatashin wrote:
    > > > Add struct page zeroing as a part of initialization of other fields in
    > > > __init_single_page().
    > > >
    > > > This single thread performance collected on: Intel(R) Xeon(R) CPU E7-8895
    > > > v3 @ 2.60GHz with 1T of memory (268400646 pages in 8 nodes):
    > > >
    > > > BASE FIX
    > > > sparse_init 11.244671836s 0.007199623s
    > > > zone_sizes_init 4.879775891s 8.355182299s
    > > > --------------------------
    > > > Total 16.124447727s 8.362381922s
    > >
    > > Hmm, this is confusing. This assumes that sparse_init doesn't zero pages
    > > anymore, right? So these number depend on the last patch in the series?
    >
    > Correct, without the last patch sparse_init time won't change.

    THen this is just misleading.
    --
    Michal Hocko
    SUSE Labs

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