From: Andrew Morton <akpm@linux-foundation.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-m68k@vger.kernel.org,
Roman Zippel <zippel@linux-m68k.org>
Subject: Re: [patch 2/2] m68k: Discontinuous memory support
Date: Tue, 29 May 2007 17:44:35 -0700 [thread overview]
Message-ID: <20070529174435.80a13c24.akpm@linux-foundation.org> (raw)
In-Reply-To: <20070528191715.597623909@mail.of.borg>
On Mon, 28 May 2007 21:16:32 +0200
Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> + for_each_online_pgdat(pgdat) {
> + for (i = 0; i < pgdat->node_spanned_pages; i++) {
> + struct page *page = pgdat->node_mem_map + i;
> + total++;
> + if (PageReserved(page))
> + reserved++;
> + else if (PageSwapCache(page))
> + cached++;
> + else if (!page_count(page))
> + free++;
This isn't really true. Callers of the page allocator don't _have_ to use
page_count(): they can internally perform their own refcounting. One such
caller is slab, so this "free" count can end up being grossly wrong.
> + else
> + shared += page_count(page) - 1;
> + }
next prev parent reply other threads:[~2007-05-30 0:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-28 19:16 [patch 0/2] A few more m68k patches Geert Uytterhoeven
2007-05-28 19:16 ` [patch 1/2] m68k: runtime patching infrastructure Geert Uytterhoeven
2007-05-30 0:38 ` Andrew Morton
2007-05-30 5:48 ` Eric Dumazet
2007-05-30 7:06 ` Geert Uytterhoeven
2007-05-30 8:20 ` Joerg Dorchain
2007-05-30 11:19 ` Geert Uytterhoeven
2007-05-30 11:40 ` Joerg Dorchain
2007-05-30 8:23 ` Andreas Schwab
2007-05-30 18:03 ` Linus Torvalds
2007-06-03 15:56 ` Wouter Verhelst
2007-05-28 19:16 ` [patch 2/2] m68k: Discontinuous memory support Geert Uytterhoeven
2007-05-30 0:44 ` Andrew Morton [this message]
2007-05-30 0:45 ` Andrew Morton
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