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
