From: mfbaustx <mfbaustx@gmail.com>
To: "Oliver Neukum" <oliver@neukum.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: copy_from_user / copy_to_user with no swap space
Date: Mon, 16 Oct 2006 14:47:13 -0500 [thread overview]
Message-ID: <op.thi48zvznwjy9v@titan> (raw)
In-Reply-To: <200610162128.45229.oliver@neukum.org>
>>> No. Your code may be only partially paged into RAM.
>>> The same can happen for any mmaped data.
That's what I thought I read. But then my question is: with on-demand
paging, is it possible to have two processes partially paged? Surely, it
MUST be the case that any processes with overlapping logical address
spaces must be paged coherently. So, while on-demand "paging-in" allows
for partial paging of a process, is it the case that, on a context switch,
the user-space PTE's are completely erased (so that you get page-faults
and can then on-demand page them in...)?
next prev parent reply other threads:[~2006-10-16 19:47 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-16 19:19 mfbaustx
2006-10-16 19:28 ` Oliver Neukum
2006-10-16 19:47 ` mfbaustx [this message]
2006-10-17 10:58 ` Horst H. von Brand
2006-10-17 12:00 ` Helge Hafting
2006-10-16 19:34 ` Al Viro
2006-10-16 19:39 ` Kyle Moffett
2006-10-16 20:26 ` mfbaustx
2006-10-16 20:21 ` Horst H. von Brand
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