[Qemu-devel] [PATCH v2 0/4] qcow2: Allow runtime specification of cache sizes

[Max Reitz]

Currently, the metadata cache size is only tunable on compile time
through macros. However, some users may want to use the minimal cache
size (for whatever reason) and others may want to increase the cache
size because they have enough memory and want to increase performance.

This series adds runtime options for setting the cache size in bytes
(which is an easily comprehensible unit) in various ways (by setting
each cache explicitly or the total size).


This series (patch 2) depends on Markus' series
"[PATCH v2 0/4] block: Use g_new() & friends more".


v2:
 - Patch 2: c->entries may be NULL in the fail path; respect that case


git-backport-diff against v1:

Key:
[----] : patches are identical
[####] : number of functional differences between upstream/downstream patch
[down] : patch is downstream-only
The flags [FC] indicate (F)unctional and (C)ontextual differences, respectively

001/4:[----] [--] 'qcow2: Constant cache size in bytes'
002/4:[0006] [FC] 'qcow2: Use g_try_new0() for cache array'
003/4:[----] [--] 'qcow2: Add runtime options for cache sizes'
004/4:[----] [--] 'iotests: Add test for qcow2's cache options'


Max Reitz (4):
  qcow2: Constant cache size in bytes
  qcow2: Use g_try_new0() for cache array
  qcow2: Add runtime options for cache sizes
  iotests: Add test for qcow2's cache options

 block/qcow2-cache.c        |  13 +++--
 block/qcow2.c              | 120 +++++++++++++++++++++++++++++++++++++++++----
 block/qcow2.h              |  13 ++++-
 tests/qemu-iotests/103     |  99 +++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/103.out |  29 +++++++++++
 tests/qemu-iotests/group   |   1 +
 6 files changed, 259 insertions(+), 16 deletions(-)
 create mode 100755 tests/qemu-iotests/103
 create mode 100644 tests/qemu-iotests/103.out

-- 
2.0.4