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From: Dave Hansen <dave@linux.vnet.ibm.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: KyongHo Cho <pullip.cho@samsung.com>,
	Kukjin Kim <kgene.kim@samsung.com>,
	KeyYoung Park <keyyoung.park@samsung.com>,
	linux-kernel@vger.kernel.org, Ilho Lee <ilho215.lee@samsung.com>,
	linux-mm@kvack.org, linux-samsung-soc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] ARM: mm: Regarding section when dealing with meminfo
Date: Mon, 24 Jan 2011 10:47:37 -0800	[thread overview]
Message-ID: <1295894857.11047.556.camel@nimitz> (raw)
In-Reply-To: <20110124175807.GA27427@n2100.arm.linux.org.uk>

On Mon, 2011-01-24 at 17:58 +0000, Russell King - ARM Linux wrote:
> Wrong.  For flatmem, we have a pfn_valid() which is backed by doing a
> one, two or maybe rarely three compare search of the memblocks.  Short
> of having a bitmap of every page in the 4GB memory space, you can't
> get more efficient than that.

Sweet.  So, we can just take the original patch that started this
conversation, add the requisite pfn_valid()s and pfn_to_page()s, and
skip the sparsemem #ifdefs.  Right?

-- Dave


  reply	other threads:[~2011-01-24 18:48 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-20  9:45 KyongHo Cho
2011-01-20 14:28 ` Minchan Kim
2011-01-20 17:25   ` Dave Hansen
     [not found]   ` <AANLkTinXAiShaf1f69ufVHg7KPaY5j=jmOTtK71GNNp5@mail.gmail.com>
2011-01-20 17:43     ` Minchan Kim
2011-01-20 17:44       ` Minchan Kim
2011-01-20 17:52         ` KyongHo Cho
2011-01-20 17:20 ` Dave Hansen
     [not found]   ` <AANLkTi=nsAOtLPK75Wy5Rm8pfWob8xTP5259DyYuxR9J@mail.gmail.com>
2011-01-20 17:48     ` KyongHo Cho
2011-01-20 18:04     ` Dave Hansen
2011-01-20 18:01   ` Russell King - ARM Linux
2011-01-20 18:11     ` Dave Hansen
2011-01-23 18:05       ` Russell King - ARM Linux
2011-01-24 16:52         ` Dave Hansen
2011-01-24 17:58           ` Russell King - ARM Linux
2011-01-24 18:47             ` Dave Hansen [this message]
2011-01-25  0:33             ` KyongHo Cho
2011-01-21  2:12     ` KyongHo Cho
2011-01-21 10:38       ` Russell King - ARM Linux
2011-01-21 11:15         ` KyongHo Cho

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