[PATCH v6 00/16] xen: common: rbtree: ported updates from Linux tree

[Praveen Kumar <kpraveen.lkml@gmail.com>]

Hi All,

The patch imports the changes and updates of the rbtree implementaiton
from Linux tree. But since, the only current implementation is with tmem.c,
which am not much aware off much and therefore, was unable to test the changes
thoroughly. Having said that, I do have plans of adding futher code changes
which will be using rb-tree more in credit2 scheduler and that will help in
further testing the same.

I have not imported augmented, rcu and patches which added new rbtree
functionality, as there was no specific requirement for current planned
implementation.

Below are the categorized Linux commit versions which are not imported :

Augmented rbtree :
14b94af0b251a2c80885b60538166fb7d04a642e
9d9e6f9703bbd642f3f2f807e6aaa642a4cbcec9
9c079add0d0f45220f4bb37febf0621137ec2d38
3cb7a56344ca45ee56d71c5f8fe9f922306bff1f
f231aebfc4cae2f6ed27a46a31e2630909513d77


Add postorder iteration functions:
9dee5c51516d2c3fff22633c1272c5652e68075a

RCU related implementation :
d72da4a4d973d8a0a0d3c97e7cdebf287fbe3a99
c1adf20052d80f776849fa2c1acb472cdeb7786c
ce093a04543c403d52c1a5788d8cb92e47453aba

Please share your inputs. Thanks in advance.

Regards,

~Praveen.

Praveen Kumar (16):
  rbtree: remove redundant if()-condition in rb_erase()
  rbtree: empty nodes have no color
  rbtree: move some implementation details from rbtree.h to rbtree.c
  rbtree: break out of rb_insert_color loop after tree rotation
  rbtree: adjust root color in rb_insert_color() only when necessary
  rbtree: low level optimizations in rb_insert_color()
  rbtree: adjust node color in __rb_erase_color() only when necessary
  rbtree: optimize case selection logic in __rb_erase_color()
  rbtree: low level optimizations in __rb_erase_color()
  rbtree: coding style adjustments
  rbtree: optimize fetching of sibling node
  rbtree: add __rb_change_child() helper function
  rbtree: place easiest case first in rb_erase()
  rbtree: handle 1-child recoloring in rb_erase() instead of
    rb_erase_color()
  rbtree: low level optimizations in rb_erase()
  rbtree: fix typo in comment of rb_insert_color

 xen/common/rbtree.c      | 646 ++++++++++++++++++++++++++++++-----------------
 xen/include/xen/rbtree.h |  38 +--
 2 files changed, 428 insertions(+), 256 deletions(-)

---
Updated set of changes catering the comments provided.
2.13.1


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