From: Shaohui Zheng <shaohui.zheng@linux.intel.com>
To: Eric B Munson <emunson@mgebm.net>
Cc: shaohui.zheng@intel.com, akpm@linux-foundation.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
haicheng.li@linux.intel.com, lethal@linux-sh.org,
ak@linux.intel.com, rientjes@google.com, dave@linux.vnet.ibm.com,
gregkh@suse.de, Haicheng Li <haicheng.li@intel.com>
Subject: Re: [1/7,v8] NUMA Hotplug Emulator: documentation
Date: Wed, 8 Dec 2010 07:20:00 +0800 [thread overview]
Message-ID: <20101207232000.GA5353@shaohui> (raw)
In-Reply-To: <20101207182420.GA2038@mgebm.net>
On Tue, Dec 07, 2010 at 11:24:20AM -0700, Eric B Munson wrote:
> Shaohui,
>
> The documentation patch seems to be stale, it needs to be updated to match the
> new file names.
>
Eric,
the major change on the patchset is on the interface, for the v8 emulator,
we accept David's per-node debugfs add_memory interface, we already included
in the documentation patch. the change is very small, so it is not obvious.
This is the change on the documentation compare with v7:
+3) Memory hotplug emulation:
+
+The emulator reserves memory before OS boots, the reserved memory region is
+removed from e820 table. Each online node has an add_memory interface, and
+memory can be hot-added via the per-ndoe add_memory debugfs interface.
+
+The difficulty of Memory Release is well-known, we have no plan for it until
+now.
+
+ - reserve memory thru a kernel boot paramter
+ mem=1024m
+
+ - add a memory section to node 3
+ # echo 0x40000000 > mem_hotplug/node3/add_memory
+ OR
+ # echo 1024m > mem_hotplug/node3/add_memory
+
--
Thanks & Regards,
Shaohui
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next prev parent reply other threads:[~2010-12-08 0:45 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-07 1:00 [0/7,v8] NUMA Hotplug Emulator (v8) shaohui.zheng
2010-12-07 1:00 ` [1/7,v8] NUMA Hotplug Emulator: documentation shaohui.zheng
2010-12-07 18:24 ` Eric B Munson
2010-12-07 23:20 ` Shaohui Zheng [this message]
2010-12-08 17:46 ` Eric B Munson
2010-12-09 0:09 ` Shaohui Zheng
2010-12-08 18:16 ` Eric B Munson
2010-12-08 21:16 ` David Rientjes
2010-12-09 0:23 ` Shaohui Zheng
2010-12-08 21:18 ` David Rientjes
2010-12-09 0:33 ` Shaohui Zheng
2010-12-07 1:00 ` [2/7,v8] NUMA Hotplug Emulator: Add numa=possible option shaohui.zheng
2010-12-07 1:00 ` [3/7,v8] NUMA Hotplug Emulator: Add node hotplug emulation shaohui.zheng
2010-12-07 1:00 ` [4/7,v8] NUMA Hotplug Emulator: Abstract cpu register functions shaohui.zheng
2010-12-07 1:00 ` [5/7,v8] NUMA Hotplug Emulator: Support cpu probe/release in x86_64 shaohui.zheng
2010-12-08 21:36 ` David Rientjes
2010-12-09 9:37 ` Tejun Heo
2010-12-10 8:01 ` Zheng, Shaohui
2010-12-10 1:35 ` Zheng, Shaohui
2010-12-07 1:00 ` [6/7,v8] NUMA Hotplug Emulator: Fake CPU socket with logical CPU on x86 shaohui.zheng
2010-12-07 1:00 ` [7/7,v8] NUMA Hotplug Emulator: Implement per-node add_memory debugfs interface shaohui.zheng
2010-12-08 21:31 ` David Rientjes
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