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Re: [RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when allocate a odd alignment area

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On Tue 11-10-16 21:24:50, zijun_hu wrote:
> From: zijun_hu <zijun_hu@htc.com>
> 
> the LSB of a chunk->map element is used for free/in-use flag of a area
> and the other bits for offset, the sufficient and necessary condition of
> this usage is that both size and alignment of a area must be even numbers
> however, pcpu_alloc() doesn't force its @align parameter a even number
> explicitly, so a odd @align maybe causes a series of errors, see below
> example for concrete descriptions.

Is or was there any user who would use a different than even (or power of 2)
alighment? If not is this really worth handling?

-- 
Michal Hocko
SUSE Labs

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[RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when allocate a  odd alignment area zijun_hu <zijun_hu@zoho.com> - 2016-10-11 15:30 +0200
  Re: [RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when  allocate a odd alignment area Michal Hocko <mhocko@kernel.org> - 2016-10-11 19:30 +0200
    Re: [RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when  allocate a odd alignment area zijun_hu <zijun_hu@zoho.com> - 2016-10-12 02:30 +0200
      Re: [RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when  allocate a odd alignment area Michal Hocko <mhocko@kernel.org> - 2016-10-12 09:00 +0200
        Re: [RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when  allocate a odd alignment area zijun_hu <zijun_hu@zoho.com> - 2016-10-12 09:30 +0200
          Re: [RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when  allocate a odd alignment area zijun_hu <zijun_hu@zoho.com> - 2016-10-12 10:50 +0200
            Re: [RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when  allocate a odd alignment area Michal Hocko <mhocko@kernel.org> - 2016-10-12 12:00 +0200
              Re: [RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when  allocate a odd alignment area zijun_hu <zijun_hu@zoho.com> - 2016-10-12 12:00 +0200
          Re: [RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when  allocate a odd alignment area Michal Hocko <mhocko@kernel.org> - 2016-10-12 11:30 +0200
        Re: [RFC PATCH 1/1] mm/percpu.c: fix memory leakage issue when  allocate a odd alignment area zijun_hu <zijun_hu@zoho.com> - 2016-10-12 09:30 +0200

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