From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joel Schopp Date: Thu, 09 Feb 2006 21:39:22 +0000 Subject: Re: [Lhms-devel] [RFC:PATCH(000/003)] Memory add to onlined node. Message-Id: <43EBB68A.3040105@austin.ibm.com> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "Luck, Tony" Cc: Yasunori Goto , Andi Kleen , "Brown, Len" , "Tolentino, Matthew E" , "S, Naveen B" , Bjorn Helgaas , ACPI-ML , Linux Kernel ML , linux-ia64@vger.kernel.org, x86-64 Discuss , Linux Hotplug Memory Support >> - if the node is already online.- If the node is offline, >> (It means new node is comming!) then the memory will belongs >> to node 0 yet. > > What is the long term plan to address this? Can you make sure > that the new node is always brought online before you get to > this code? Or will you have to bring the node online in the > middle of the memory hot-add code? > > Presumably there is a similar issue with hot add cpu. > Yes, cpu hot add has the same issue. It's really a performance issue, not a functional one so you haven't seen people beating down the doors to fix it. Technically there isn't anything but manpower standing in the way of doing it. But it is a good amount of work for the little it gains. -Joel