linux-kernel - Re: Fun with looping binds over proc

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Message-ID: <CAH6sp9PWt9ZyctdqRF5LMQdm1K8Ph-KJ4ODNv69y6L2kbYrMHg@mail.gmail.com>
Date:	Thu, 30 Oct 2014 13:47:36 +0100
From:	Frans Klaver <fransklaver@...il.com>
To:	Serge Kosyrev <skosyrev@...ecurity.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Fun with looping binds over proc

Hi,

On Thu, Oct 30, 2014 at 1:07 PM, Serge Kosyrev <skosyrev@...ecurity.com> wrote:
>
> [deepfire@...romedae:~/repro-kernel-loop-mount]$ uname -a
> Linux andromedae 3.14.22 #1-NixOS SMP Thu Jan 1 00:00:01 UTC 1970 x86_64 GNU/Linux
>

<snip>

> [deepfire@...romedae:~/repro-kernel-loop-mount]$ time sudo ./repro.sh
>
> real    0m3.186s
> user    0m0.010s
> sys     0m3.023s
>
> [deepfire@...romedae:~/repro-kernel-loop-mount]$ time sudo ./repro.sh
>
> real    0m6.732s
> user    0m0.013s
> sys     0m6.032s
>
> [deepfire@...romedae:~/repro-kernel-loop-mount]$ time sudo ./repro.sh
>
> real    0m14.541s
> user    0m0.008s
> sys     0m12.115s
> Please read the FAQ at  http://www.tux.org/lkml/

I don't seem to be able to reproduce this on 3.17.0-rc3. Tried the
latest rc release?

Frans
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