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    SubjectRe: [PATCH RFC 3/3] proc/smaps: show amount of hwpoison pages
    KOSAKI Motohiro wrote:
    > On Mon, Apr 30, 2012 at 7:29 AM, Konstantin Khlebnikov
    > <khlebnikov@openvz.org> wrote:
    >> This patch adds line "HWPoinson:<size> kB" into /proc/pid/smaps if
    >> CONFIG_MEMORY_FAILURE=y and some HWPoison pages were found.
    >> This may be useful for searching applications which use a broken memory.
    >
    > I dislike "maybe useful" claim. If we don't know exact motivation of a feature,
    > we can't maintain them especially when a bugfix can't avoid ABI change.
    >
    > Please write down exact use case.

    I don't know how to exactly use this hw-poison stuff, but smaps suppose to
    export state of ptes in vma. It seems to rational to show also hw-poisoned ptes,
    since kernel has this feature and pte can be in hw-poisoned state.

    and now everyone can easily find them:
    # sudo grep HWPoison /proc/*/smaps


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