Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common path

From	Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common path
Date	2016-11-10 10:20 +0100
Message-ID	<sBTGx-3Ex-13@gated-at.bofh.it> (permalink)
References	<sB1Ga-1xZ-7@gated-at.bofh.it> <sB1Zw-1Es-23@gated-at.bofh.it> <sBT3P-3a8-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Nov 10, 2016 at 02:06:14PM +0530, Anshuman Khandual wrote:
> On 11/08/2016 05:01 AM, Naoya Horiguchi wrote:
> > If one of callers of page migration starts to handle thp, memory management code
> > start to see pmd migration entry, so we need to prepare for it before enabling.
> > This patch changes various code point which checks the status of given pmds in
> > order to prevent race between thp migration and the pmd-related works.
> 
> There are lot of changes in this one patch. Should not we split
> this up into multiple patches and explain them in a bit detail
> through their commit messages ?

Yes, and I admit that I might change more than necessary, if the context
never encounters migration entry for any reason, no change is needed.
I'll dig more detail.

- Naoya Horiguchi

Thread

[PATCH v2 00/12] mm: page migration enhancement for thp Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-11-08 00:40 +0100
  [PATCH v2 02/12] mm: mempolicy: add queue_pages_node_check() Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-11-08 00:50 +0100
  [PATCH v2 07/12] mm: thp: check pmd migration entry in common path Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-11-08 01:00 +0100
    Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common  path kbuild test robot <lkp@intel.com> - 2016-11-08 01:30 +0100
      Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common  path Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-11-08 02:30 +0100
    Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common  path Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2016-11-10 09:40 +0100
      Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common  path Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-11-10 10:20 +0100
    Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common  path Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-11-10 10:30 +0100
      Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common  path Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-11-10 10:40 +0100
      Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common path "Hillf Danton" <hillf.zj@alibaba-inc.com> - 2016-11-10 10:40 +0100
    Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common path "Hillf Danton" <hillf.zj@alibaba-inc.com> - 2016-11-10 10:30 +0100
  [PATCH v2 06/12] mm: thp: enable thp migration in generic path Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-11-08 01:40 +0100
  Re: [PATCH v2 00/12] mm: page migration enhancement for thp Balbir Singh <bsingharora@gmail.com> - 2016-11-09 03:40 +0100
    Re: [PATCH v2 00/12] mm: page migration enhancement for thp Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-11-09 06:10 +0100
      Re: [PATCH v2 00/12] mm: page migration enhancement for thp Balbir Singh <bsingharora@gmail.com> - 2016-11-09 22:30 +0100
  Re: [PATCH v2 00/12] mm: page migration enhancement for thp Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2016-11-09 11:40 +0100
    Re: [PATCH v2 00/12] mm: page migration enhancement for thp Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> - 2016-11-10 01:00 +0100
      Re: [PATCH v2 00/12] mm: page migration enhancement for thp Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2016-11-11 04:50 +0100

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