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[Xen-devel] [PATCH 0/4] CPU online/offline support in Xen

  • To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>
  • From: "Shan, Haitao" <haitao.shan@xxxxxxxxx>
  • Date: Tue, 9 Sep 2008 16:58:41 +0800
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Tue, 09 Sep 2008 01:59:07 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AckSWkJgEiGnevdPRMa43z+Ofqe5HA==
  • Thread-topic: [PATCH 0/4] CPU online/offline support in Xen

Hi, Keir,

The following patches enable Xen to online/offline a physical CPU. This
feature will be needed by possibly CPU hot-plug and RAS features.
Some code of cpu online/offline is already in Xen, ever since S3 feature
was added to Xen. This patch series only adds the missing part.

Note: We only add the code to implement the function that actually
online/offline a CPU. The patches for tests are only served as a test
purpose. We do the tests by hooking online/offline decision to vcpu
online/offline path in Dom0. Thus, writes to
/sys/devices/system/cpu/cpuX/online will online/offline the vcpu, as
well as physical cpu.

Here is the description of the patches.

cpu_offline.patch       Implements cpu offline feature
cpu_online.patch        Implements cpu online feature

cpu_online_offline_test.patch   Used for tests -- Xen part
cpu_online_offline_kernel.patch Used for tests -- Dom0 kernel part

Best Regards
Haitao Shan

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