From: Tejun Heo <tj@kernel.org>
To: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: rjw@sisk.pl, lenb@kernel.org, tglx@linutronix.de, mingo@elte.hu,
hpa@zytor.com, 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 09:58:15 -0400 [thread overview]
Message-ID: <20130909135815.GB25434@htj.dyndns.org> (raw)
In-Reply-To: <522db781.22ab440a.41b1.ffffd825SMTPIN_ADDED_BROKEN@mx.google.com>
Hello,
On Mon, Sep 09, 2013 at 07:56:34PM +0800, Wanpeng Li wrote:
> If allocate from low to high as what this patchset done will occupy the
> precious memory you mentioned?
Yeah, and that'd be the reason why this behavior is dependent on a
kernel option. That said, allocating some megs on top of kernel isn't
a big deal. The wretched ISA DMA is mostly gone now and some megs
isn't gonna hurt 32bit DMAs in any noticeable way. I wouldn't be too
surprised if nobody notices after switching the default behavior to
allocate early mem close to kernel. Maybe the only case which might
be impacted is 32bit highmem configs, but they're messed up no matter
what anyway and even they shouldn't be affected noticeably if large
mapping is in use.
Thanks.
--
tejun
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2013-09-09 13:58 UTC|newest]
Thread overview: 52+ 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 ` [PATCH 01/11] memblock: Rename current_limit to current_limit_high in memblock 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 ` [PATCH 03/11] memblock: Introduce lowest limit in memblock 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 ` [PATCH 05/11] memblock: Introduce allocation order to memblock 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 9:27 ` 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
2013-09-04 0:24 ` Toshi Kani
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
2013-09-04 0:37 ` Toshi Kani
2013-09-04 2:05 ` Tang Chen
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
2013-08-28 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 ` [PATCH 10/11] x86, mem-hotplug: Support initialize page tables from low to high Tang Chen
2013-09-05 13:30 ` Wanpeng Li
2013-09-06 1:34 ` Tang Chen
2013-09-06 2:16 ` Wanpeng Li
2013-09-06 3:09 ` Tang Chen
2013-09-06 2:16 ` Wanpeng Li
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
2013-09-04 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 8:03 ` Wanpeng Li
2013-08-28 9:34 ` Tang Chen
2013-08-28 15:19 ` Tejun Heo
2013-08-29 1:30 ` Tang Chen
2013-08-29 1:36 ` Wanpeng Li
2013-08-29 1:53 ` Tang Chen
2013-08-29 1:36 ` Wanpeng Li
2013-09-02 1:03 ` Tang Chen
2013-09-04 19:22 ` Tejun Heo
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 15:47 ` H. Peter Anvin
2013-09-09 12:04 ` Wanpeng Li
2013-09-09 12:04 ` Wanpeng Li
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 [this message]
2013-09-09 23:58 ` Wanpeng Li
2013-09-09 23:58 ` Wanpeng Li
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130909135815.GB25434@htj.dyndns.org \
--to=tj@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=gong.chen@linux.intel.com \
--cc=hpa@zytor.com \
--cc=isimatu.yasuaki@jp.fujitsu.com \
--cc=izumi.taku@jp.fujitsu.com \
--cc=jiang.liu@huawei.com \
--cc=jweiner@redhat.com \
--cc=laijs@cn.fujitsu.com \
--cc=lenb@kernel.org \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=liwanp@linux.vnet.ibm.com \
--cc=lwoodman@redhat.com \
--cc=mgorman@suse.de \
--cc=mina86@mina86.com \
--cc=minchan@kernel.org \
--cc=mingo@elte.hu \
--cc=prarit@redhat.com \
--cc=riel@redhat.com \
--cc=rjw@sisk.pl \
--cc=tglx@linutronix.de \
--cc=trenn@suse.de \
--cc=vasilis.liaskovitis@profitbricks.com \
--cc=wency@cn.fujitsu.com \
--cc=x86@kernel.org \
--cc=yinghai@kernel.org \
--cc=zhangyanfei@cn.fujitsu.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).