From: "H. Peter Anvin" <hpa@zytor.com>
To: Parav Pandit <paravpandit@yahoo.com>
Cc: Linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: virtually and physically (page) aligned allocation
Date: Mon, 23 Feb 2009 22:32:41 -0800 [thread overview]
Message-ID: <49A39489.3090202@zytor.com> (raw)
In-Reply-To: <389971.28411.qm@web30104.mail.mud.yahoo.com>
Parav Pandit wrote:
> Hi,
>
> Can user space application allocate memory which is virtually and physically aligned to the system's page boundary in the Linux 2.6.x?
> Such as using posix_memalign().
>
> In other way,
> If user space application allocates memory which is aligned to page boundary for say 4 pages using posix_memalign(), will is ensure that it corresponds to exactly 4 physical pages in kernel which can be pinned down?
>
You can use hugetlbfs to allocate a 2 MB page, otherwise no.
-hpa
next prev parent reply other threads:[~2009-02-24 6:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-24 4:55 virtually and physically (page) aligned allocation Parav Pandit
2009-02-24 6:32 ` H. Peter Anvin [this message]
2009-02-24 23:48 ` Arnd Bergmann
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