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From: Larry Finger <Larry.Finger@lwfinger.net>
To: LKML <linux-kernel@vger.kernel.org>
Subject: Query about set_pages_* API
Date: Sat, 09 Feb 2008 15:40:12 -0700	[thread overview]
Message-ID: <47AE2BCC.3040605@lwfinger.net> (raw)

Is the set_pages_* API that replaces change_page_attr described somewhere? I have been unable to 
find it with Google.

I'm trying to modify the VirtualBox kernel module to work with 2.6.24-git (and 2.6.25) on x86_64 
architecture. The current code has a value of the third argument of the call (prot) with 3 variants. 
All variations have the following bits set: _PAGE_PRESENT, _PAGE_RW, _PAGE_DIRTY, and 
_PAGE_ACCESSED. Number 2 adds _PAGE_NX to the above, and number 3 adds _PAGE_GLOBAL to the bits in 
variation 1.

 From the code in arch/x86/mm/pageattr.c, I figured I need to call set_pages_wb() unconditionally, 
and set_pages_nx() if _PAGE_NX is set. Will these calls be sufficient? I thought about calling 
set_pages_rw(), but that entry is not exported.

Thanks,

Larry

             reply	other threads:[~2008-02-09 22:45 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-09 22:40 Larry Finger [this message]
2008-02-09 23:57 ` Query about set_pages_* API Arjan van de Ven
2008-02-10  0:00 ` Arjan van de Ven
2008-02-10 17:15   ` Larry Finger

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