From: "Stephen C. Tweedie" <sct@redhat.com>
To: pnilesh@in.ibm.com
Cc: linux-mm@kvack.org
Subject: Re: page->offset
Date: Wed, 12 Apr 2000 12:06:32 +0100 [thread overview]
Message-ID: <20000412120632.E7570@redhat.com> (raw)
In-Reply-To: <CA2568BF.00387B64.00@d73mta05.au.ibm.com>; from pnilesh@in.ibm.com on Wed, Apr 12, 2000 at 03:37:37PM +0530
Hi,
On Wed, Apr 12, 2000 at 03:37:37PM +0530, pnilesh@in.ibm.com wrote:
>
> One of the comment in mm.h says that we can have more than one copy of some
> page of an executable or shared lib (not normally).
>
> Does it have to do something with offet field in page structure ?
> Does it mean that it may happen becoz offset field is not guarenteed to be
> PAGE_SIZE aligned ?
Correct. There are some very old binary formats in which the pages
of the executable are not page-aligned. 2.2 still supports them
and allows such binaries to be non-aligned in cache, but there is
no guarantee of cache coherency on such mappings and they are no
longer supported in 2.3.
--Stephen
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next prev parent reply other threads:[~2000-04-12 11:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-04-12 10:07 page->offset pnilesh
2000-04-12 11:06 ` Stephen C. Tweedie [this message]
2000-04-12 13:04 page->offset pnilesh
2000-04-12 14:45 ` page->offset Stephen C. Tweedie
2000-04-12 15:29 ` page->offset Eric W. Biederman
2000-04-13 4:53 page->offset pnilesh
2000-04-13 6:07 ` page->offset Matti Aarnio
2000-04-13 19:34 ` page->offset Andrea Arcangeli
2000-04-13 9:59 ` page->offset Stephen C. Tweedie
2000-04-13 11:19 page->offset pnilesh
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