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    SubjectRe: [PATCH][RFC] Pollable /proc/<pid>/ - avoid SIGCHLD/poll() races
    Paul Menage <> wrote:
    >Except that this enhancement is not completely safe, as if you get more
    >than 1024 children reaped (assuming you send two bytes of pid and two
    >bytes of status) between checks of the pipe, you'll lose notifications.

    Obviously, but the cases where the number of children is bounded below
    1024 are rather frequent

    >At least if you're only using the pipe to stop select() from blocking,
    >you don't care about overflowing the pipe as there's no important
    >information in there anyway.

    sure, but then you have to put the pid/exit status somewhere else and
    do some signal blocking/unblocking. In either case, it's portable,
    which polling on /proc/pid isn't

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