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From: KyongHo Cho <pullip.cho@samsung.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Dave Hansen <dave@linux.vnet.ibm.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: Fri, 21 Jan 2011 20:15:24 +0900 [thread overview]
Message-ID: <AANLkTi=8DnGVJ6j4rHv+bQoTK2UhgMysC95LuKjH-fBy@mail.gmail.com> (raw)
In-Reply-To: <20110121103850.GI13235@n2100.arm.linux.org.uk>
On Fri, Jan 21, 2011 at 7:38 PM, Russell King - ARM Linux
<linux@arm.linux.org.uk> wrote:
> On Fri, Jan 21, 2011 at 11:12:27AM +0900, KyongHo Cho wrote:
>> Since the size of section is 256 mib and NR_BANKS is defined as 8,
>> no ARM system can have more RAM than 2GiB in the current implementation.
>> If you want banks in meminfo not to cross sparsemem boundaries,
>> we need to find another way of physical memory specification in the kernel.
>
> There is no problem with increasing NR_BANKS.
> --
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>
I think it is not reasonable to split a contiguous physical memory
into several chunks.
9 banks are required to use 2 gib.
Even though you think it is no problem,
it becomes a problem when we want to give physical memory information
via booting command line but atag
because there is a restriction in number of characters in booting command line.
I don't understand why larger bank size than the section size is problem.
prev parent reply other threads:[~2011-01-21 11:15 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
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 [this message]
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