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

From	Dave Hansen <dave.hansen@intel.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] mm, swap: Make VMA based swap readahead configurable
Date	2017-10-02 22:50 +0200
Message-ID	<uwfPj-ur-281@gated-at.bofh.it> (permalink)
References	(7 earlier) <uukSS-3A0-23@gated-at.bofh.it> <uul2x-3HA-13@gated-at.bofh.it> <uullT-4d4-3@gated-at.bofh.it> <uullT-4d4-9@gated-at.bofh.it> <uuvuW-2ck-3@gated-at.bofh.it>
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On 09/27/2017 06:02 PM, Huang, Ying wrote:
> I still think there may be a performance regression for some users
> because of the change of the algorithm and the knobs, and the
> performance regression can be resolved via setting the new knob.  But I
> don't think there will be a functionality regression.  Do you agree?

A performance regression is a regression.  I don't understand why we are
splitting hairs as to what kind of regression it is.

Are you only willing to fix it if it's a functional regression?

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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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