[PATCH 0/2] md: Change active_io to percpu

[Xiao Ni <xni@redhat.com>]

Hi all

This is a optimization for active_io. Now it's atomic type and
added/decreased when io comes, but it's only needed to be checked
when suspending raid. So we can change it to percpu type.

The first patch factors out a helper function which is used in
the second patch.

The patches have been tested by regression test under tests directory.
I did a performance test too. In my environment there is no big change.

Xiao Ni (2):
  Factor out is_md_suspended helper
  Change active_io to percpu

 drivers/md/md.c | 46 ++++++++++++++++++++++++++++++----------------
 drivers/md/md.h |  2 +-
 2 files changed, 31 insertions(+), 17 deletions(-)

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2.32.0 (Apple Git-132)