tree 55b4ecd93ce9c22722c9c9da0dd28a2d2f7c082d
parent a11034b4282515fd7d9f6fdc0a1380781da461c3
author Dan Williams <dan.j.williams@intel.com> 1247597302 -0700
committer Dan Williams <dan.j.williams@intel.com> 1251598166 -0700

md/raid6: move the spare page to a percpu allocation

In preparation for asynchronous handling of raid6 operations move the
spare page to a percpu allocation to allow multiple simultaneous
synchronous raid6 recovery operations.

Make this allocation cpu hotplug aware to maximize allocation
efficiency.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>