From: William Lee Irwin III <wli@holomorphy.com>
To: Mel <mel@csn.ul.ie>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Updated Commentry Patches
Date: Thu, 16 May 2002 21:47:48 -0700 [thread overview]
Message-ID: <20020517044748.GP7076@holomorphy.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0205170429130.29254-100000@skynet>
> 2.4.19pre8_page_alloc_commentry
> http://www.csn.ul.ie/~mel/projects/vm/patches/2.4.19pre8_page_alloc_commentry
> This extends the documentation on page_alloc.c to describe how the buddy
> allocator works
One way to describe the bit toggling behavior is saying that each page
has a "virtual bit", the bit present in the bitmap is the xor of the
"virtual bits" of the two buddies, and the buddy's bit is recovered by
xor'ing with the bit of the page we're examining, which is known from
the entry point.
Cheers,
Bill
prev parent reply other threads:[~2002-05-17 4:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-17 3:49 [PATCH] Updated Commentry Patches Mel
2002-05-17 4:47 ` William Lee Irwin III [this message]
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