From: William Lee Irwin III <wli@holomorphy.com>
To: Willibald Krenn <Willibald.Krenn@gmx.at>
Cc: Arjan van de Ven <arjan@infradead.org>, linux-kernel@vger.kernel.org
Subject: Re: VMM: syscall for reordering pages in vm
Date: Mon, 8 Nov 2004 19:05:55 -0800 [thread overview]
Message-ID: <20041109030555.GA2973@holomorphy.com> (raw)
In-Reply-To: <418F661E.6050601@gmx.at>
Arjan van de Ven schrieb:
>> eh isn't this already possible with mmap and mremap ?
On Mon, Nov 08, 2004 at 01:27:10PM +0100, Willibald Krenn wrote:
> If I'm not mistaken: You can not tell mmap and mremap to explicitely
> exchange two pages. (Mremap resizes an existing memory mapping.)
> Perhaps I did not explain my idea good enough: I want something along
> the lines "Current memory contents in page starting at address X move to
> address Y and the contents of the page starting at address Y shall be
> found at address X in future".
You're thinking of POSIX mremap(2); Linux' actual mremap() ABI allows
relocation of pages within a process address space, though only to
previously unoccupied locations, not direct exchange.
-- wli
prev parent reply other threads:[~2004-11-09 3:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-08 10:51 VMM: syscall for reordering pages in vm Willibald Krenn
2004-11-08 12:04 ` Arjan van de Ven
2004-11-08 12:27 ` Willibald Krenn
2004-11-09 3:05 ` William Lee Irwin III [this message]
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