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
WARNING: multiple messages have this Message-ID (diff)
From: dave@linux.vnet.ibm.com (Dave Hansen)
To: linux-arm-kernel@lists.infradead.org
Subject: [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
WARNING: multiple messages have this Message-ID (diff)
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
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next prev parent reply other threads:[~2011-01-24 18:48 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-20 9:45 [PATCH] ARM: mm: Regarding section when dealing with meminfo KyongHo Cho
2011-01-20 9:45 ` KyongHo Cho
2011-01-20 9:45 ` KyongHo Cho
2011-01-20 14:28 ` Minchan Kim
2011-01-20 14:28 ` Minchan Kim
2011-01-20 14:28 ` Minchan Kim
2011-01-20 17:25 ` Dave Hansen
2011-01-20 17:25 ` Dave Hansen
2011-01-20 17:25 ` Dave Hansen
[not found] ` <AANLkTinXAiShaf1f69ufVHg7KPaY5j=jmOTtK71GNNp5@mail.gmail.com>
2011-01-20 17:43 ` Minchan Kim
2011-01-20 17:43 ` Minchan Kim
2011-01-20 17:43 ` Minchan Kim
2011-01-20 17:44 ` Minchan Kim
2011-01-20 17:44 ` Minchan Kim
2011-01-20 17:44 ` Minchan Kim
2011-01-20 17:44 ` Minchan Kim
2011-01-20 17:52 ` KyongHo Cho
2011-01-20 17:52 ` KyongHo Cho
2011-01-20 17:52 ` KyongHo Cho
2011-01-20 17:20 ` Dave Hansen
2011-01-20 17:20 ` Dave Hansen
2011-01-20 17:20 ` Dave Hansen
[not found] ` <AANLkTi=nsAOtLPK75Wy5Rm8pfWob8xTP5259DyYuxR9J@mail.gmail.com>
2011-01-20 17:48 ` KyongHo Cho
2011-01-20 17:48 ` KyongHo Cho
2011-01-20 17:48 ` KyongHo Cho
2011-01-20 18:04 ` Dave Hansen
2011-01-20 18:04 ` Dave Hansen
2011-01-20 18:04 ` Dave Hansen
2011-01-20 18:01 ` Russell King - ARM Linux
2011-01-20 18:01 ` Russell King - ARM Linux
2011-01-20 18:01 ` Russell King - ARM Linux
2011-01-20 18:11 ` Dave Hansen
2011-01-20 18:11 ` Dave Hansen
2011-01-20 18:11 ` Dave Hansen
2011-01-23 18:05 ` Russell King - ARM Linux
2011-01-23 18:05 ` Russell King - ARM Linux
2011-01-23 18:05 ` Russell King - ARM Linux
2011-01-24 16:52 ` Dave Hansen
2011-01-24 16:52 ` Dave Hansen
2011-01-24 16:52 ` Dave Hansen
2011-01-24 17:58 ` Russell King - ARM Linux
2011-01-24 17:58 ` Russell King - ARM Linux
2011-01-24 17:58 ` Russell King - ARM Linux
2011-01-24 18:47 ` Dave Hansen [this message]
2011-01-24 18:47 ` Dave Hansen
2011-01-24 18:47 ` Dave Hansen
2011-01-25 0:33 ` KyongHo Cho
2011-01-25 0:33 ` KyongHo Cho
2011-01-25 0:33 ` KyongHo Cho
2011-01-21 2:12 ` KyongHo Cho
2011-01-21 2:12 ` KyongHo Cho
2011-01-21 2:12 ` KyongHo Cho
2011-01-21 10:38 ` Russell King - ARM Linux
2011-01-21 10:38 ` Russell King - ARM Linux
2011-01-21 10:38 ` Russell King - ARM Linux
2011-01-21 11:15 ` KyongHo Cho
2011-01-21 11:15 ` KyongHo Cho
2011-01-21 11:15 ` KyongHo Cho
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