linux-kernel - get_maintainer.pl produces non-deterministic results

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Message-ID: <CACT4Y+YcCW=xwys6tvhOLXiND=2Cwe-NFkn0MDKHi=8HdGWppg@mail.gmail.com>
Date:   Tue, 10 Dec 2019 14:47:29 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Joe Perches <joe@...ches.com>,
        Vegard Nossum <vegard.nossum@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: get_maintainer.pl produces non-deterministic results

Hi Joe,

scripts/get_maintainer.pl fs/proc/task_mmu.c
non-deterministically gives me from 13 to 16 results, different number
every time (on upstream 6794862a). Perl v5.28.1. Michael confirmed
this with v5.28.2.
Vergard suggested to check PERL_HASH_SEED=0. Indeed it fixes
non-determinism. But I guess it's not the right solution, there should
be some logical problem.
My perl-fo is weak, I appreciate if somebody with proper perl-fo takes a look.

Thanks