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Date:   Tue, 20 Nov 2018 09:39:12 -0800
From:   Matthew Wilcox <willy@infradead.org>
To:     Pavel Machek <pavel@ucw.cz>
Cc:     Vlastimil Babka <vbabka@suse.cz>,
        Daniel Colascione <dancol@google.com>,
        linux-kernel@vger.kernel.org, rppt@linux.ibm.com,
        timmurray@google.com, joelaf@google.com, surenb@google.com,
        Jonathan Corbet <corbet@lwn.net>,
        Andrew Morton <akpm@linux-foundation.org>,
        Roman Gushchin <guro@fb.com>,
        Mike Rapoport <rppt@linux.vnet.ibm.com>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        "Dennis Zhou (Facebook)" <dennisszhou@gmail.com>,
        Prashant Dhamdhere <pdhamdhe@redhat.com>,
        "open list:DOCUMENTATION" <linux-doc@vger.kernel.org>
Subject: Re: [PATCH v2] Document /proc/pid PID reuse behavior
Message-ID: <20181120173912.GD3065@bombadil.infradead.org>
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 <20181119105426.GD28607@amd>
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On Tue, Nov 20, 2018 at 10:18:29AM +0100, Pavel Machek wrote:
> > would ever rely on the pid being reused while having the descriptor
> > open. How would that make sense?
> 
> I agree this is corner space, but users might be surprised that
> keeping FDs of /proc/pid/X would lead to PID space exhaustion, for
> example.

We have a limit on the number of FDs a process can have open for a reason.
Well, for many reasons.