Anatol Belski 55b3bad2c3 block: Drop the middle buffer on the unaligned O_DIRECT path ...

run_unaligned_operation staged every unaligned request in a plain Vec
and then handed it to AlignedFile, which bounced again through an
aligned buffer. That Vec only gave the operation a contiguous range to
scatter into or gather from, which the aligned buffer already is, so
each slow path request paid for an extra allocation and a full length
copy.

Add read_unaligned and write_unaligned on AlignedFile that own the
single aligned bounce and scatter or gather through a closure over the
staging slice. run_unaligned_operation and the FileExt read_at and
write_at impls both route through them, so the staging and
read-modify-write logic lives in one place. The closures keep
AlignedFile free of any AsyncIoOperation dependency.

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

2026-07-01 16:27:25 +00:00

..

src

block: Drop the middle buffer on the unaligned O_DIRECT path

2026-07-01 16:27:25 +00:00

Cargo.toml

block: vhdx: Use zerocopy for structs

2026-07-01 12:51:55 +00:00