linux-kernel - Re: [PATCH -mm] Don't truncate /proc/PID/environ at 4096 characters

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Message-Id: <200709191454.l8JEsAQO010080@harpo.it.uu.se>
Date:	Wed, 19 Sep 2007 16:54:10 +0200 (MEST)
From:	Mikael Pettersson <mikpe@...uu.se>
To:	james-p@...ing-picture.com, linux-kernel@...r.kernel.org
Cc:	aarapov@...hat.com, akpm@...ux-foundation.org, hpa@...or.com
Subject: Re: [PATCH -mm] Don't truncate /proc/PID/environ at 4096 characters

On Wed, 19 Sep 2007 14:35:29 +0100, James Pearson wrote:
> /proc/PID/environ currently truncates at 4096 characters, patch based on 
> the /proc/PID/mem code.

Does /proc/PID/mem even work? If I do `strace cat /proc/PID/mem > /dev/null'
for a known good PID, the first read() from /proc/PID/mem fails with ESRCH,
which is bullocks. cat /proc/PID/environ does work. I'm seeing this on
2.6.22 vanilla, 2.6.20 FC6, and 2.6.18 RHEL5 kernels.

/Mikael
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