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Re: [PATCH] mm, swap: Make VMA based swap readahead configurable

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Michal Hocko <mhocko@kernel.org> writes:

> On Thu 21-09-17 09:33:10, Huang, Ying wrote:
>> From: Huang Ying <ying.huang@intel.com>
>> 
>> This patch adds a new Kconfig option VMA_SWAP_READAHEAD and wraps VMA
>> based swap readahead code inside #ifdef CONFIG_VMA_SWAP_READAHEAD/#endif.
>> This is more friendly for tiny kernels.
>
> How (much)?

OK.  I will measure it.

>> And as pointed to by Minchan
>> Kim, give people who want to disable the swap readahead an opportunity
>> to notice the changes to the swap readahead algorithm and the
>> corresponding knobs.
>
> Why would anyone want that?
>
> Please note that adding new config options make the already complicated
> config space even more problematic so there should be a good reason to
> add one. Please make sure your justification is clear on why this is
> worth the future maintenance and configurability burden.

Hi, Minchan,

Could you give more information on this?

Best Regards,
Huang, Ying

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[PATCH] mm, swap: Make VMA based swap readahead configurable "Huang, Ying" <ying.huang@intel.com> - 2017-09-21 03:40 +0200
  Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Minchan Kim <minchan@kernel.org> - 2017-09-25 07:50 +0200
    Re: [PATCH] mm, swap: Make VMA based swap readahead configurable "Huang\, Ying" <ying.huang@intel.com> - 2017-09-25 08:00 +0200
      Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Minchan Kim <minchan@kernel.org> - 2017-09-25 08:20 +0200
        Re: [PATCH] mm, swap: Make VMA based swap readahead configurable "Huang\, Ying" <ying.huang@intel.com> - 2017-09-25 08:30 +0200
          Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Minchan Kim <minchan@kernel.org> - 2017-09-25 08:40 +0200
  Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Michal Hocko <mhocko@kernel.org> - 2017-09-26 15:30 +0200
    Re: [PATCH] mm, swap: Make VMA based swap readahead configurable "Huang\, Ying" <ying.huang@intel.com> - 2017-09-27 03:40 +0200
    Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Minchan Kim <minchan@kernel.org> - 2017-09-27 07:10 +0200
      Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Michal Hocko <mhocko@kernel.org> - 2017-09-27 09:50 +0200
        Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Minchan Kim <minchan@kernel.org> - 2017-09-27 10:10 +0200
          Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Michal Hocko <mhocko@kernel.org> - 2017-09-27 10:40 +0200
            Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Minchan Kim <minchan@kernel.org> - 2017-09-27 15:20 +0200
              Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Michal Hocko <mhocko@kernel.org> - 2017-09-27 15:30 +0200
                Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Minchan Kim <minchan@kernel.org> - 2017-09-27 15:50 +0200
                Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Michal Hocko <mhocko@kernel.org> - 2017-09-27 16:00 +0200
                Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Minchan Kim <minchan@kernel.org> - 2017-09-27 16:20 +0200
                Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Michal Hocko <mhocko@kernel.org> - 2017-09-27 16:20 +0200
                Re: [PATCH] mm, swap: Make VMA based swap readahead configurable "Huang\, Ying" <ying.huang@intel.com> - 2017-09-28 03:10 +0200
                Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Michal Hocko <mhocko@kernel.org> - 2017-10-02 09:30 +0200
                Re: [PATCH] mm, swap: Make VMA based swap readahead configurable Dave Hansen <dave.hansen@intel.com> - 2017-10-02 22:50 +0200

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