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Re: [PATCH -mm -v6 2/9] mm, memcg: Support to charge/uncharge multiple swap entries

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On Wed, 2017-03-08 at 15:26 +0800, Huang, Ying wrote:
> From: Huang Ying <ying.huang@intel.com>
> 
> This patch make it possible to charge or uncharge a set of continuous
> swap entries in the swap cgroup.  The number of swap entries is
> specified via an added parameter.
> 
> This will be used for the THP (Transparent Huge Page) swap support.
> Where a swap cluster backing a THP may be allocated and freed as a
> whole.  So a set of (HPAGE_PMD_NR) continuous swap entries backing one
> THP need to be charged or uncharged together.  This will batch the
> cgroup operations for the THP swap too.

A quick look at the patches makes it look sane. I wonder if we would
make sense to track THP swapout separately as well
(from a memory.stat perspective)

Balbir Singh

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[PATCH -v6 0/9] THP swap: Delay splitting THP during swapping out "Huang, Ying" <ying.huang@intel.com> - 2017-03-08 08:40 +0100
  [PATCH -mm -v6 5/9] mm, THP, swap: Support to clear SWAP_HAS_CACHE for huge page "Huang, Ying" <ying.huang@intel.com> - 2017-03-08 08:40 +0100
  [PATCH -mm -v6 2/9] mm, memcg: Support to charge/uncharge multiple swap entries "Huang, Ying" <ying.huang@intel.com> - 2017-03-08 08:40 +0100
    Re: [PATCH -mm -v6 2/9] mm, memcg: Support to charge/uncharge  multiple swap entries Balbir Singh <bsingharora@gmail.com> - 2017-03-08 12:50 +0100
      Re: [PATCH -mm -v6 2/9] mm, memcg: Support to charge/uncharge multiple swap entries "Huang\, Ying" <ying.huang@intel.com> - 2017-03-09 02:40 +0100
        Re: [PATCH -mm -v6 2/9] mm, memcg: Support to charge/uncharge  multiple swap entries Balbir Singh <bsingharora@gmail.com> - 2017-03-09 22:30 +0100
  [PATCH -mm -v6 7/9] mm, THP: Add can_split_huge_page() "Huang, Ying" <ying.huang@intel.com> - 2017-03-08 08:40 +0100
  [PATCH -mm -v6 1/9] mm, swap: Make swap cluster size same of THP size on x86_64 "Huang, Ying" <ying.huang@intel.com> - 2017-03-08 12:20 +0100
    Re: [PATCH -mm -v6 1/9] mm, swap: Make swap cluster size same of THP  size on x86_64 Matthew Wilcox <willy@infradead.org> - 2017-03-08 14:30 +0100
      Re: [PATCH -mm -v6 1/9] mm, swap: Make swap cluster size same of THP size on x86_64 "Huang\, Ying" <ying.huang@intel.com> - 2017-03-09 02:50 +0100

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