Messages in this thread | | | From | "Amir Hermelin" <> | Subject | RE: PG_reserved bug | Date | Wed, 26 Nov 2003 15:07:13 +0200 |
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Can't I just not use the reserved bit (therefore effectively use the refcount), and keep the minimal count at 1 or 2? Will that have the same effect as setting the reserved bit?
Amir.
-----Original Message----- From: linux-kernel-owner@vger.kernel.org [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of William Lee Irwin III Sent: Wednesday, November 26, 2003 2:50 PM To: Amir Hermelin Cc: linux-kernel@vger.kernel.org Subject: Re: PG_reserved bug
On Wed, Nov 26, 2003 at 02:45:06PM +0200, Amir Hermelin wrote: > Ok, fair enough. According to what you say, this behavior won't > change in 2.6. So, I'm still left with my second question: since I do > access the pages from several places in my module, and I want to use > the refcount field of the struct page (and not have to wrap the pages > in another structure) so I know when my page is no longer referenced, > how can I make sure it's 'safe' to not use the reserved bit?
It looks like you'll have to wrap the pages in another structure. The refcounts for reserved pages are effectively meaningless.
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