From: "Stephen C. Tweedie" <sct@redhat.com>
To: "Benjamin C.R. LaHaise" <blah@kvack.org>
Cc: Alexander Viro <viro@math.psu.edu>,
"Stephen C. Tweedie" <sct@redhat.com>,
Richard F Weber <rfweber@link.com>,
linux-mm@kvack.org
Subject: Re: Hopefully a simple question on /proc/pid/mem
Date: Mon, 30 Apr 2001 22:58:02 +0100 [thread overview]
Message-ID: <20010430225802.H26638@redhat.com> (raw)
In-Reply-To: <Pine.LNX.3.96.1010430145934.30664D-100000@kanga.kvack.org>; from blah@kvack.org on Mon, Apr 30, 2001 at 03:02:40PM -0400
Hi,
On Mon, Apr 30, 2001 at 03:02:40PM -0400, Benjamin C.R. LaHaise wrote:
> On Mon, 30 Apr 2001, Alexander Viro wrote:
>
> > I wonder what's wrong with reading from /proc/<pid>/mem, though - it's
> > using the same code as ptrace.
>
> We can actually do this cleanly now that we have proper page_dirty
> semantics for raw io. The original reason for disabling /proc/*/mem was
> that it left big gaping holes in the mm code in 2.0, and it hasn't been
> repaired since.
It was mmap of /proc/*/mem which was busted. read/write should be OK.
Hint: think about what happens if you make a shared mapping of a
private proc/*/mem region...
--Stephen
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next prev parent reply other threads:[~2001-04-30 21:58 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-30 18:17 Richard F Weber
2001-04-30 18:50 ` Stephen C. Tweedie
2001-04-30 19:00 ` Alexander Viro
2001-04-30 19:02 ` Benjamin C.R. LaHaise
2001-04-30 19:26 ` Alexander Viro
2001-04-30 19:26 ` Benjamin C.R. LaHaise
2001-04-30 19:44 ` Alexander Viro
2001-04-30 21:58 ` Stephen C. Tweedie [this message]
2001-05-01 1:13 ` Eric W. Biederman
2001-05-01 9:36 ` Stephen C. Tweedie
2001-05-01 15:16 ` Eric W. Biederman
2001-04-30 19:13 ` Richard F Weber
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