selftests: ublk: add batch buffer management infrastructure

Browse source

Add the foundational infrastructure for UBLK_F_BATCH_IO buffer
management including:

- Allocator utility functions for small sized per-thread allocation
- Batch buffer allocation and deallocation functions
- Buffer index management for commit buffers
- Thread state management for batch I/O mode
- Buffer size calculation based on device features

This prepares the groundwork for handling batch I/O commands by
establishing the buffer management layer needed for UBLK_U_IO_PREP_IO_CMDS
and UBLK_U_IO_COMMIT_IO_CMDS operations.

The allocator uses CPU sets for efficient per-thread buffer tracking,
and commit buffers are pre-allocated with 2 buffers per thread to handle
overlapping command operations.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

...

This commit is contained in:

Ming Lei 2026-01-16 22:18:51 +08:00 • committed by Jens Axboe

parent f1d621b5a0

commit dccbfa9d41

4 changed files with 282 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

152

tools/testing/selftests/ublk/batch.c

View file

26

tools/testing/selftests/ublk/kublk.c

View file

53

tools/testing/selftests/ublk/kublk.h

View file

54

tools/testing/selftests/ublk/utils.h

View file