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Message-Id: <1170603951.3073.1160.camel@laptopd505.fenrus.org> Date: Sun, 04 Feb 2007 16:45:51 +0100 From: Arjan van de Ven <arjan@...radead.org> To: Michal Hocko <mstsxfx@...il.com> Cc: linux-kernel@...r.kernel.org Subject: Re: mm: how to check for kernel pages On Sun, 2007-02-04 at 16:33 +0100, Michal Hocko wrote: > On Sun, Feb 04, 2007 at 02:57:30PM +0100, Arjan van de Ven wrote: > > On Sun, 2007-02-04 at 12:02 +0100, Michal Hocko wrote: > > > Hi, > > > is there any effective and fast way how to find out whether page > > > given by its page frame number is currenly used by (mapped by) kernel? > > > > what do you want to use this for? The answer to your question greatly > > depends on that... > > Sorry for not being more precise. As a part of my thesis work I need to > migrate pages. I greatly use mm/migrate.c code. > I assume that not all pages can be migrated - especially those used by > kernel (where direct virtual to physical mapping is used). > So I intended something like following code: it's more than that... even userspace pages may not be moved if they're the target of active DMA for example ..... -- if you want to mail me at work (you don't), use arjan (at) linux.intel.com Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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