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Re: [v6 13/15] mm: stop zeroing memory during allocation in vmemmap

From Pasha Tatashin <pasha.tatashin@oracle.com>
Newsgroups linux.kernel
Subject Re: [v6 13/15] mm: stop zeroing memory during allocation in vmemmap
Date 2017-08-11 18:20 +0200
Message-ID <udkPg-5Kw-11@gated-at.bofh.it> (permalink)
References <ubX8m-5vB-5@gated-at.bofh.it> <ubX8o-5vB-51@gated-at.bofh.it> <udhRo-3Vr-17@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 08/11/2017 09:04 AM, Michal Hocko wrote:
> On Mon 07-08-17 16:38:47, Pavel Tatashin wrote:
>> Replace allocators in sprase-vmemmap to use the non-zeroing version. So,
>> we will get the performance improvement by zeroing the memory in parallel
>> when struct pages are zeroed.
> 
> First of all this should be probably merged with the previous patch. The
> I think vmemmap_alloc_block would be better to split up into
> __vmemmap_alloc_block which doesn't zero and vmemmap_alloc_block which
> does zero which would reduce the memset callsites and it would make it
> slightly more robust interface.

Ok, I will add: vmemmap_alloc_block_zero() call, and merge this and the 
previous patches together.

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Thread

[v6 00/15] complete deferred page initialization Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-08-07 22:50 +0200
  [v6 09/15] sparc64: optimized struct page zeroing Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-08-07 22:50 +0200
    Re: [v6 09/15] sparc64: optimized struct page zeroing Michal Hocko <mhocko@kernel.org> - 2017-08-11 15:00 +0200
      Re: [v6 09/15] sparc64: optimized struct page zeroing Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-11 18:10 +0200
  [v6 08/15] mm: zero struct pages during initialization Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-08-07 22:50 +0200
    Re: [v6 08/15] mm: zero struct pages during initialization Michal Hocko <mhocko@kernel.org> - 2017-08-11 15:00 +0200
      Re: [v6 08/15] mm: zero struct pages during initialization Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-11 18:10 +0200
  [v6 07/15] mm: defining memblock_virt_alloc_try_nid_raw Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-08-07 22:50 +0200
    Re: [v6 07/15] mm: defining memblock_virt_alloc_try_nid_raw Michal Hocko <mhocko@kernel.org> - 2017-08-11 14:50 +0200
      Re: [v6 07/15] mm: defining memblock_virt_alloc_try_nid_raw Michal Hocko <mhocko@kernel.org> - 2017-08-11 18:10 +0200
        Re: [v6 07/15] mm: defining memblock_virt_alloc_try_nid_raw Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-11 18:30 +0200
      Re: [v6 07/15] mm: defining memblock_virt_alloc_try_nid_raw Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-11 18:10 +0200
  [v6 10/15] x86/kasan: explicitly zero kasan shadow memory Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-08-07 22:50 +0200
  [v6 05/15] mm: don't accessed uninitialized struct pages Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-08-07 22:50 +0200
    Re: [v6 05/15] mm: don't accessed uninitialized struct pages Michal Hocko <mhocko@kernel.org> - 2017-08-11 11:40 +0200
      Re: [v6 05/15] mm: don't accessed uninitialized struct pages Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-11 18:00 +0200
        Re: [v6 05/15] mm: don't accessed uninitialized struct pages Michal Hocko <mhocko@kernel.org> - 2017-08-14 13:50 +0200
          Re: [v6 05/15] mm: don't accessed uninitialized struct pages Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-14 16:00 +0200
            Re: [v6 05/15] mm: don't accessed uninitialized struct pages Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-17 17:40 +0200
              Re: [v6 05/15] mm: don't accessed uninitialized struct pages Michal Hocko <mhocko@kernel.org> - 2017-08-17 17:50 +0200
    Re: [v6 05/15] mm: don't accessed uninitialized struct pages Michal Hocko <mhocko@kernel.org> - 2017-08-15 11:40 +0200
  [v6 11/15] arm64/kasan: explicitly zero kasan shadow memory Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-08-07 22:50 +0200
    Re: [v6 11/15] arm64/kasan: explicitly zero kasan shadow memory Will Deacon <will.deacon@arm.com> - 2017-08-08 11:10 +0200
      Re: [v6 11/15] arm64/kasan: explicitly zero kasan shadow memory Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-08 14:00 +0200
        Re: [v6 11/15] arm64/kasan: explicitly zero kasan shadow memory Will Deacon <will.deacon@arm.com> - 2017-08-08 14:40 +0200
          Re: [v6 11/15] arm64/kasan: explicitly zero kasan shadow memory Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-08 15:00 +0200
        RE: [v6 11/15] arm64/kasan: explicitly zero kasan shadow memory David Laight <David.Laight@ACULAB.COM> - 2017-08-08 15:20 +0200
          Re: [v6 11/15] arm64/kasan: explicitly zero kasan shadow memory Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-08 15:40 +0200
  [v6 13/15] mm: stop zeroing memory during allocation in vmemmap Pavel Tatashin <pasha.tatashin@oracle.com> - 2017-08-07 22:50 +0200
    Re: [v6 13/15] mm: stop zeroing memory during allocation in vmemmap Michal Hocko <mhocko@kernel.org> - 2017-08-11 15:10 +0200
      Re: [v6 13/15] mm: stop zeroing memory during allocation in vmemmap Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-11 18:20 +0200
  Re: [v6 00/15] complete deferred page initialization Michal Hocko <mhocko@kernel.org> - 2017-08-11 10:00 +0200
    Re: [v6 00/15] complete deferred page initialization Pasha Tatashin <pasha.tatashin@oracle.com> - 2017-08-11 17:20 +0200
      Re: [v6 00/15] complete deferred page initialization Michal Hocko <mhocko@kernel.org> - 2017-08-11 17:30 +0200

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