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Re: Why don't shared anonymous mappings work?

To: Colin Plumb <colin@nyx.net>, <linux-mm@kvack.org>
Subject: Re: Why don't shared anonymous mappings work?
From: ebiederm+eric@ccr.net (Eric W. Biederman)
Date: 06 Jan 1999 23:55:03 -0600
In-Reply-To: ebiederm+eric@ccr.net's message of "06 Jan 1999 13:51:00 -0600"
References: <199901061523.IAA14788@nyx10.nyx.net> <m1d84sgoyj.fsf@flinx.ccr.net>
Sender: owner-linux-mm@kvack.org

And of course the last reason I just thought of, which is probably the real reason.

Currenlty anonymous pages if the are writable are assumed to have exactly
one mapping, or if it is in the swap cache the page is assumed to be read only.

So reusing the swap inode could be a real problem.

Eric


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Follow-Ups:
- Re: Why don't shared anonymous mappings work?
  - From: "Stephen C. Tweedie" <sct@redhat.com>

References:
- Re: Why don't shared anonymous mappings work?
  - From: ebiederm+eric@ccr.net (Eric W. Biederman)

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