linux-kernel - Re: Could convert a buffer that allocated by vmalloc to pages?

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Message-Id: <1169557944.4475.8.camel@imp.csi.cam.ac.uk>
Date:	Tue, 23 Jan 2007 13:12:24 +0000
From:	Anton Altaparmakov <aia21@....ac.uk>
To:	Yu-Chen Wu <g944370@...nthu.edu.tw>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Could convert a buffer that allocated by vmalloc to pages?

On Tue, 2007-01-23 at 21:04 +0800, Yu-Chen Wu wrote:
> Hi,
> I write a driver have a big buffer (16MB,allocated by vmalloc).
> I want to use the buffer to do DMA transmission so I need getting the pages
> of the buffer.
> Have any kernel API can do this?
> My platform is x86_64 and 2GB RAM

vmalloc_to_page()...

See mm/memory.c for the function and how to use it.

Best regards,

        Anton
-- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer, http://www.linux-ntfs.org/

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