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[Xen-devel] [PATCH 0/2] xen/rcu: let rcu work better with core scheduling

Today the RCU handling in Xen is affecting scheduling in several ways.
It is raising sched softirqs without any real need and it requires
tasklets for rcu_barrier(), which interacts badly with core scheduling.

This small series repairs those issues.

Juergen Gross (2):
  xen/rcu: use rcu softirq for forcing quiescent state
  xen/rcu: don't use stop_machine_run() for rcu_barrier()

 xen/common/rcupdate.c      | 69 ++++++++++++++++++++++++++++++----------------
 xen/include/xen/rcupdate.h |  2 +-
 2 files changed, 46 insertions(+), 25 deletions(-)


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