[PATCH 0/2] Replace posix_fallocate() with falloate()

[Nir Soffer]

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(-)

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2.26.2