From: Hugh Dickins <hugh@veritas.com>
To: yipee <yipeeyipeeyipeeyipee@yahoo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: changing physical page
Date: Thu, 2 Feb 2006 17:18:04 +0000 (GMT) [thread overview]
Message-ID: <Pine.LNX.4.61.0602021711110.8796@goblin.wat.veritas.com> (raw)
In-Reply-To: <loom.20060202T160457-366@post.gmane.org>
On Thu, 2 Feb 2006, yipee wrote:
>
> On a system running without swap, can there be a case in which the
> kernel decides to move (from one physical page to another)
> a dynamically-allocated page owned by a user program?
I'll assume that when you say "page owned by a user program", you're
meaning a private page, not a shared file page mapped into the program.
If you're asking about what currently happens, the answer is "No".
If you're asking about what you can assume, the answer is "Yes".
The kernel is entitled to move them if it wishes, various people
are interested in page migration, and one application would be if
the system is short of free memory of a particular kind, and your
page is on such memory, and it would help to move it elsewhere.
Hugh
next prev parent reply other threads:[~2006-02-02 17:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-02 15:08 yipee
2006-02-02 15:50 ` linux-os (Dick Johnson)
2006-02-02 16:23 ` yipee
2006-02-02 16:47 ` linux-os (Dick Johnson)
2006-02-03 4:58 ` yipee
2006-02-02 17:18 ` Hugh Dickins [this message]
2006-02-04 14:29 ` yipee
2006-02-04 15:20 ` Hugh Dickins
2006-02-05 7:00 ` Gleb Natapov
2006-02-05 11:55 ` Hugh Dickins
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