[PATCH v2 0/2] xen/sched: split scheduler vtable from scheduler

Each struct scheduler currently doubles as both a scheduler 
backend's static vtable (name, opt_name, sched_id and every 
function pointer) and the per-cpupool runtime object that 
scheduler_alloc() allocates. Because these are the same type, 
scheduler_alloc() memcpy()s the entire vtable into a fresh heap 
allocation for every cpupool it creates. With N cpupools running 
the same scheduler, this duplicates N copies of identical function 
pointers and identifying fields that never differ between 
instances - the only fields that are genuinely per-cpupool are 
sched_data and cpupool.

This series splits the vtable out into its own type, struct 
sched_ops, so it can be shared by every cpupool using a given 
scheduler instead of copied per cpupool. struct scheduler is left 
holding only what is actually per-instance: a pointer to the 
shared sched_ops, plus sched_data and cpupool.

Patch 1 contains the whole functional change: struct sched_ops is 
introduced, every in-tree scheduler backend is converted to it, 
and struct scheduler is shrunk accordingly.
Patch 2 is a pure rename of the symbols to match the new sched_ops.

v2: folded the previous 7-patch series into two patches.

Furkan Caliskan (2):
  xen/sched: split scheduler vtable from struct scheduler
  xen/sched: rename scheduler registration symbols

 xen/arch/arm/xen.lds.S      |   2 +-
 xen/arch/ppc/xen.lds.S      |   2 +-
 xen/arch/riscv/xen.lds.S    |   2 +-
 xen/arch/x86/xen.lds.S      |   2 +-
 xen/common/sched/arinc653.c |  11 +---
 xen/common/sched/core.c     |  81 ++++++++++++++++-------------
 xen/common/sched/cpupool.c  |   7 +--
 xen/common/sched/credit.c   |   5 +-
 xen/common/sched/credit2.c  |   5 +-
 xen/common/sched/null.c     |   5 +-
 xen/common/sched/private.h  | 100 +++++++++++++++++++-----------------
 xen/common/sched/rt.c       |   5 +-
 xen/include/xen/xen.lds.h   |  10 ++--
 13 files changed, 119 insertions(+), 118 deletions(-)

-- 
2.34.1