Anatol Belski 6633072a28 block: vhd: Enable O_DIRECT for fixed VHD images ...

Thread the direct flag from the disk open options through VhdDisk into
the AlignedFile the workers run on, so a fixed VHD opened with direct=on
issues O_DIRECT I/O instead of buffered I/O. Alignment is probed once on
that AlignedFile and reused by the sync and io_uring workers.

Advertise host topology from VhdDisk::topology by probing the underlying
file. On a 4096 byte sector filesystem opened with O_DIRECT this reports
logical_block_size 4096 to the guest, so the guest never issues 512 byte
I/O that the host kernel would reject as misaligned. Falls back to the
default topology with a warning when the probe fails.

Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>

2026-06-20 11:46:17 +00:00

..

src

block: vhd: Enable O_DIRECT for fixed VHD images

2026-06-20 11:46:17 +00:00

Cargo.toml

performance-metrics: Switch to QcowDisk

2026-06-08 13:19:32 +00:00