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From: "H. Peter Anvin" <hpa@zytor.com>
To: Mikael Pettersson <mikpe@it.uu.se>
Cc: james-p@moving-picture.com, linux-kernel@vger.kernel.org,
	aarapov@redhat.com, akpm@linux-foundation.org
Subject: Re: [PATCH -mm] Don't truncate /proc/PID/environ at 4096 characters
Date: Wed, 19 Sep 2007 08:59:23 -0700	[thread overview]
Message-ID: <46F1475B.5050107@zytor.com> (raw)
In-Reply-To: <200709191454.l8JEsAQO010080@harpo.it.uu.se>

Mikael Pettersson wrote:
> 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,

Of course it does.  Address zero isn't typically mapped.

	-hpa

  reply	other threads:[~2007-09-19 16:03 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-19 14:54 [PATCH -mm] Don't truncate /proc/PID/environ at 4096 characters Mikael Pettersson
2007-09-19 15:59 ` H. Peter Anvin [this message]
2007-09-19 18:35   ` Mikael Pettersson
2007-09-19 19:29     ` Hugh Dickins
  -- strict thread matches above, loose matches on Subject: below --
2007-09-25 16:44 James Pearson
2007-09-19 13:35 James Pearson
2007-09-20 23:46 ` Andrew Morton
2007-09-21  9:41   ` James Pearson
2007-09-21 10:00   ` Mel Gorman
2007-09-21  1:56 ` Arvin Moezzi
2007-09-21  9:47   ` James Pearson
2007-09-21 12:47     ` Arvin Moezzi
2007-09-21 13:47       ` James Pearson

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