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Date: Sat, 1 Dec 2001 23:03:11 +0100 (CET)
From: Maciej Zenczykowski <maze@druid.if.uj.edu.pl>
To: <linux-kernel@vger.kernel.org>
Subject: [OT] Wrapping memory.
Message-ID: <Pine.LNX.4.33.0112012249440.15977-100000@druid.if.uj.edu.pl>
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Hi All,

I have a pseudo-on-topic question:

I would like to have a 64 KBarray (of char), that's trivial, however what
I would like is for the last 4 KB [yes thankfully this is exactly one
page... (assume i386)] to reference the same physical memory as the first
four.

I.e. 16 4KB pages referencing physical 4 KB pages number 0..14, 0.

Is this at all possible? If so, how would I do this in user space (and
could it be done without root priv?)?

Thanks a lot,

Maciej Zenczykowski.

P.S. Yes, this is necessary, otherwise I have to give up on 32-bit access
(switch to 8-bit) and include mod 60KB in every memory access (very random
and I don't think I could predict when no to do this...]

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