Change preallocation=falloc to use fallocate() instead of posix_fallocte(), improving performance when legacy filesystem that do not support fallocate, and avoiding issues seen with OFD locks.
More work is needed to respect cache mode when using full preallocation and maybe optimize buffer size. Continuing the discussion at: https://lists.nongnu.org/archive/html/qemu-block/2020-08/msg00947.html Nir Soffer (2): block: file-posix: Extract preallocate helpers block: file-posix: Replace posix_fallocate with fallocate block/file-posix.c | 202 ++++++++++++++----------- docs/system/qemu-block-drivers.rst.inc | 11 +- docs/tools/qemu-img.rst | 11 +- qapi/block-core.json | 4 +- 4 files changed, 127 insertions(+), 101 deletions(-) -- 2.26.2
