kernel.git/drivers/xen/pcpu.c, branch linux-3.7.yHosts the 0x221E linux distro kernel.
https://git.0xinfinity.dev/distro/kernel.git/atom?h=linux-3.7.y2012-07-19T19:51:39Zxen/pcpu: Xen physical cpus online/offline sys interface2012-07-19T19:51:39ZLiu, Jinsong2012-06-11T12:38:08Zurn:sha1:f65c9bb3fb725551d3e405f4d092caf24929cebe
This patch provide Xen physical cpus online/offline sys interface.
User can use it for their own purpose, like power saving:
by offlining some cpus when light workload it save power greatly.
Its basic workflow is, user online/offline cpu via sys interface,
then hypercall xen to implement, after done xen inject virq back to dom0,
and then dom0 sync cpu status.
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>