linux-kernel - mapping of pages out of upper 128MB into kernel address space

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Message-ID: <1GmwSV-2BnPRg0@fwd32.sul.t-online.de>
Date:	22 Nov 2006 18:05 GMT
From:	<pledr@...nline.de>
To:	<linux-kernel@...r.kernel.org>
Subject: mapping of pages out of upper 128MB into kernel address space

Hi,
in a kernel module I have to translate user addresses into kernel addresses. The user uses shared memory allocated with shm_open / ftruncate. This shared memory is allocated somewhere in the upmost 128MB of physical memory that is NOT permanently mapped into the kernel ( found in swapper_pg_dir ). How can I "smp_save" map this memory into the kernel address space ?

Kind regards
Peter Lezoch
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