From: Wanpeng Li <liwanp@linux.vnet.ibm.com>
To: "H. Peter Anvin" <hpa@zytor.com>, Tejun Heo <tj@kernel.org>
Cc: rjw@sisk.pl, lenb@kernel.org, tglx@linutronix.de, mingo@elte.hu,
akpm@linux-foundation.org, trenn@suse.de, yinghai@kernel.org,
jiang.liu@huawei.com, wency@cn.fujitsu.com, laijs@cn.fujitsu.com,
isimatu.yasuaki@jp.fujitsu.com, izumi.taku@jp.fujitsu.com,
mgorman@suse.de, minchan@kernel.org, mina86@mina86.com,
gong.chen@linux.intel.com, vasilis.liaskovitis@profitbricks.com,
lwoodman@redhat.com, riel@redhat.com, jweiner@redhat.com,
prarit@redhat.com, zhangyanfei@cn.fujitsu.com, x86@kernel.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-acpi@vger.kernel.org
Subject: Re: [PATCH 00/11] x86, memblock: Allocate memory near kernel image before SRAT parsed.
Date: Mon, 9 Sep 2013 20:04:29 +0800 [thread overview]
Message-ID: <20130909120429.GA25626@hacker.(null)> (raw)
In-Reply-To: <157310e1-f8cb-4184-b58d-63cf9fa611ee@email.android.com>
Hi Peter and Tejun,
On Fri, Sep 06, 2013 at 08:47:45AM -0700, H. Peter Anvin wrote:
>Specifically there are a bunch of things which need to be below a certain address (which one varies.)
>
off-topic
If memblock allocator have less fragmentation than old bootmem allocator?
Regards,
Wanpeng Li
>Tejun Heo <tj@kernel.org> wrote:
>>Hello, Wanpeng.
>>
>>On Fri, Sep 06, 2013 at 04:58:11PM +0800, Wanpeng Li wrote:
>>> What's the root reason memblock alloc from high to low? To reduce
>>> fragmentation or ...
>>
>>Because low memory tends to be more precious, it's just easier to pack
>>everything towards the top so that we don't have to worry about which
>>zone to use for allocation and fallback logic.
>>
>>Thanks.
>
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next prev parent reply other threads:[~2013-09-09 12:04 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-27 9:37 [PATCH 00/11] x86, memblock: Allocate memory near kernel image before SRAT parsed Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-08-27 9:37 ` [PATCH 01/11] memblock: Rename current_limit to current_limit_high in memblock Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-08-27 9:37 ` [PATCH 02/11] memblock: Rename memblock_set_current_limit() to memblock_set_current_limit_high() Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-08-27 9:37 ` [PATCH 03/11] memblock: Introduce lowest limit in memblock Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-08-27 9:37 ` [PATCH 04/11] memblock: Introduce memblock_set_current_limit_low() to set lower limit of memblock Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-08-27 9:37 ` [PATCH 05/11] memblock: Introduce allocation order to memblock Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-09-05 9:16 ` Wanpeng Li
2013-09-05 9:16 ` Wanpeng Li
2013-09-05 9:21 ` Tang Chen
2013-09-05 9:21 ` Tang Chen
2013-09-05 9:27 ` Wanpeng Li
2013-09-05 9:27 ` Wanpeng Li
2013-08-27 9:37 ` [PATCH 06/11] memblock: Improve memblock to support allocation from lower address Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-09-04 0:24 ` Toshi Kani
2013-09-04 0:24 ` Toshi Kani
2013-09-04 1:00 ` Tang Chen
2013-09-04 1:00 ` Tang Chen
2013-08-27 9:37 ` [PATCH 07/11] x86, memblock: Set lowest limit for memblock_alloc_base_nid() Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-09-04 0:37 ` Toshi Kani
2013-09-04 0:37 ` Toshi Kani
2013-09-04 2:05 ` Tang Chen
2013-09-04 2:05 ` Tang Chen
2013-09-04 15:22 ` Toshi Kani
2013-09-04 15:22 ` Toshi Kani
2013-08-27 9:37 ` [PATCH 08/11] x86, acpi, memblock: Use __memblock_alloc_base() in acpi_initrd_override() Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-08-28 0:04 ` Rafael J. Wysocki
2013-08-28 0:04 ` Rafael J. Wysocki
2013-08-27 9:37 ` [PATCH 09/11] mem-hotplug: Introduce movablenode boot option to {en|dis}able using SRAT Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-08-27 9:37 ` [PATCH 10/11] x86, mem-hotplug: Support initialize page tables from low to high Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-09-05 13:30 ` Wanpeng Li
2013-09-06 1:34 ` Tang Chen
2013-09-06 1:34 ` Tang Chen
2013-09-06 2:16 ` Wanpeng Li
2013-09-06 2:16 ` Wanpeng Li
2013-09-06 3:09 ` Tang Chen
2013-09-06 3:09 ` Tang Chen
2013-09-05 13:30 ` Wanpeng Li
2013-08-27 9:37 ` [PATCH 11/11] x86, mem_hotplug: Allocate memory near kernel image before SRAT is parsed Tang Chen
2013-08-27 9:37 ` Tang Chen
2013-09-04 19:40 ` Toshi Kani
2013-09-04 19:40 ` Toshi Kani
2013-08-28 8:03 ` [PATCH 00/11] x86, memblock: Allocate memory near kernel image before SRAT parsed Wanpeng Li
2013-08-28 9:34 ` Tang Chen
2013-08-28 9:34 ` Tang Chen
2013-08-28 8:03 ` Wanpeng Li
2013-08-28 15:19 ` Tejun Heo
2013-08-28 15:19 ` Tejun Heo
2013-08-29 1:30 ` Tang Chen
2013-08-29 1:30 ` Tang Chen
2013-08-29 1:36 ` Wanpeng Li
2013-08-29 1:53 ` Tang Chen
2013-08-29 1:53 ` Tang Chen
2013-08-29 1:36 ` Wanpeng Li
2013-09-02 1:03 ` Tang Chen
2013-09-02 1:03 ` Tang Chen
2013-09-04 19:22 ` Tejun Heo
2013-09-04 19:22 ` Tejun Heo
2013-09-05 9:01 ` Tang Chen
2013-09-05 9:01 ` Tang Chen
2013-09-06 8:58 ` Wanpeng Li
2013-09-06 8:58 ` Wanpeng Li
[not found] ` <52299935.0302450a.26c9.ffffb240SMTPIN_ADDED_BROKEN@mx.google.com>
2013-09-06 15:15 ` Tejun Heo
2013-09-06 15:15 ` Tejun Heo
2013-09-06 15:47 ` H. Peter Anvin
2013-09-06 15:47 ` H. Peter Anvin
2013-09-09 12:04 ` Wanpeng Li
2013-09-09 12:04 ` Wanpeng Li [this message]
2013-09-09 11:56 ` Wanpeng Li
2013-09-09 11:56 ` Wanpeng Li
[not found] ` <522db781.22ab440a.41b1.ffffd825SMTPIN_ADDED_BROKEN@mx.google.com>
2013-09-09 13:58 ` Tejun Heo
2013-09-09 13:58 ` Tejun Heo
2013-09-09 23:58 ` Wanpeng Li
2013-09-09 23:58 ` Wanpeng Li
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