The first patch reduces chances of QEMU crash in unusual (but not unlikely) cases especially when used by Libvirt (see commit message).
The second patch halves fd for images. The third adds some more test for patch one (would have caught the regression caused by v2). Fam Zheng (3): file-posix: Skip effectiveless OFD lock operations file-posix: Drop s->lock_fd tests: Add unit tests for image locking block/file-posix.c | 83 ++++++++++++-------- tests/Makefile.include | 2 + tests/test-image-locking.c | 152 +++++++++++++++++++++++++++++++++++++ 3 files changed, 207 insertions(+), 30 deletions(-) create mode 100644 tests/test-image-locking.c -- 2.17.1
