[PATCH v3 0/9] Minor xenguest optimisations

[Frediano Ziglio <freddy77@xxxxxxxxx>]

From: Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>

Reduce some number of parts passed to writev.
Avoid possible allocation sending data with writev.
Reduce number of allocations sending memory state.

Changes since v1:
- add commit to cache up to 4 pages in hypercall;
- add other 2 commits reducing chunks passed to write/writev.

Changes since v2:
- update patches commit prefixes;
- add other 2 optisations.

Edwin Török (2):
  libs/guest: allocate various migration arrays just once
  libs/call: cache up to 4 pages in hypercall bounce buffers

Frediano Ziglio (7):
  libs/guest: Reduce number of parts in write_split_record
  libs/guest: Reduce number of I/O vectors in write_batch
  libs/guest: Reduce number of I/O vectors in write_batch
  libs/guest: Use a single write_exact in write_headers
  libs/guest: avoids using 2 indexes
  libs/guest: fill directly iov structure
  libs/ctrl: Allows writev_exact to change iov array

 tools/libs/call/buffer.c         |  28 +++--
 tools/libs/call/core.c           |   3 +-
 tools/libs/call/private.h        |   8 +-
 tools/libs/ctrl/xc_private.c     |  26 +----
 tools/libs/ctrl/xc_private.h     |   2 +-
 tools/libs/guest/xg_sr_common.c  |   6 +-
 tools/libs/guest/xg_sr_common.h  |  12 +++
 tools/libs/guest/xg_sr_restore.c |  26 ++---
 tools/libs/guest/xg_sr_save.c    | 169 +++++++++++++------------------
 9 files changed, 128 insertions(+), 152 deletions(-)

-- 
2.54.0