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From: Alexander Duyck <alexander.h.duyck@linux.intel.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: pavel.tatashin@microsoft.com, mhocko@suse.com,
	dave.jiang@intel.com, alexander.h.duyck@linux.intel.com,
	linux-kernel@vger.kernel.org, willy@infradead.org,
	davem@davemloft.net, khalid.aziz@oracle.com,
	rppt@linux.vnet.ibm.com, vbabka@suse.cz,
	sparclinux@vger.kernel.org, dan.j.williams@intel.com,
	ldufour@linux.vnet.ibm.com, mgorman@techsingularity.net,
	mingo@kernel.org, kirill.shutemov@linux.intel.com
Subject: [mm PATCH 0/5] Deferred page init improvements
Date: Fri, 05 Oct 2018 08:11:57 -0700	[thread overview]
Message-ID: <20181005151006.17473.83040.stgit@localhost.localdomain> (raw)

This patchset is essentially a refactor of the page initialization logic
that is meant to provide for better code reuse while providing a
significant improvement in deferred page initialization performance.

In my testing I have seen a 60% reduction in the time needed for deferred
memory initialization on two different x86_64 based test systems I have. In
addition this provides a very slight improvement for the hotplug memory 
initialization, although the improvement doesn't exceed 5% from what I can
tell and that is to be expected since most of the changes related to
hotplug init are mostly just code clean-up to allow for reuse.

The biggest gains of this patchset come from not having to test each pfn
multiple times to see if it is valid and if it is actually a part of the
node being initialized.

---

Alexander Duyck (5):
      mm: Use mm_zero_struct_page from SPARC on all 64b architectures
      mm: Drop meminit_pfn_in_nid as it is redundant
      mm: Use memblock/zone specific iterator for handling deferred page init
      mm: Move hot-plug specific memory init into separate functions and optimize
      mm: Use common iterator for deferred_init_pages and deferred_free_pages


 arch/sparc/include/asm/pgtable_64.h |   30 --
 include/linux/memblock.h            |   58 ++++
 include/linux/mm.h                  |   33 ++
 mm/memblock.c                       |   63 ++++
 mm/page_alloc.c                     |  555 +++++++++++++++++++++--------------
 5 files changed, 485 insertions(+), 254 deletions(-)

--

             reply	other threads:[~2018-10-05 15:12 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-05 15:11 Alexander Duyck [this message]
2018-10-05 15:12 ` [mm PATCH 1/5] mm: Use mm_zero_struct_page from SPARC on all 64b architectures Alexander Duyck
2018-10-05 17:37   ` Khalid Aziz
2018-10-05 15:12 ` [mm PATCH 2/5] mm: Drop meminit_pfn_in_nid as it is redundant Alexander Duyck
2018-10-05 15:12 ` [mm PATCH 3/5] mm: Use memblock/zone specific iterator for handling deferred page init Alexander Duyck
2018-10-05 15:12 ` [mm PATCH 4/5] mm: Move hot-plug specific memory init into separate functions and optimize Alexander Duyck
2018-10-05 15:12 ` [mm PATCH 5/5] mm: Use common iterator for deferred_init_pages and deferred_free_pages Alexander Duyck

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