linux-toradex.git/mm/damon/tests, branch master

Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

2026-02-22T16:26:33+00:00

Conversion performed via this Coccinelle script:

  // SPDX-License-Identifier: GPL-2.0-only
  // Options: --include-headers-for-types --all-includes --include-headers --keep-comments
  virtual patch

  @gfp depends on patch && !(file in "tools") && !(file in "samples")@
  identifier ALLOC = {kmalloc_obj,kmalloc_objs,kmalloc_flex,
 		    kzalloc_obj,kzalloc_objs,kzalloc_flex,
		    kvmalloc_obj,kvmalloc_objs,kvmalloc_flex,
		    kvzalloc_obj,kvzalloc_objs,kvzalloc_flex};
  @@

  	ALLOC(...
  -		, GFP_KERNEL
  	)

  $ make coccicheck MODE=patch COCCI=gfp.cocci

Build and boot tested x86_64 with Fedora 42's GCC and Clang:

Linux version 6.19.0+ (user@host) (gcc (GCC) 15.2.1 20260123 (Red Hat 15.2.1-7), GNU ld version 2.44-12.fc42) #1 SMP PREEMPT_DYNAMIC 1970-01-01
Linux version 6.19.0+ (user@host) (clang version 20.1.8 (Fedora 20.1.8-4.fc42), LLD 20.1.8) #1 SMP PREEMPT_DYNAMIC 1970-01-01

Signed-off-by: Kees Cook 
Signed-off-by: Linus Torvalds

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-22T04:03:00+00:00

This converts some of the visually simpler cases that have been split
over multiple lines.  I only did the ones that are easy to verify the
resulting diff by having just that final GFP_KERNEL argument on the next
line.

Somebody should probably do a proper coccinelle script for this, but for
me the trivial script actually resulted in an assertion failure in the
middle of the script.  I probably had made it a bit _too_ trivial.

So after fighting that far a while I decided to just do some of the
syntactically simpler cases with variations of the previous 'sed'
scripts.

The more syntactically complex multi-line cases would mostly really want
whitespace cleanup anyway.

Signed-off-by: Linus Torvalds

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook

mm/damon: rename DAMON_MIN_REGION to DAMON_MIN_REGION_SZ

2026-01-31T22:22:46+00:00

The macro is for the default minimum size of each DAMON region.  There was
a case that a reader was confused if it is the minimum number of total
DAMON regions, which is set on damon_attrs->min_nr_regions.  Make the name
more explicit.

Link: https://lkml.kernel.org/r/20260117175256.82826-8-sj@kernel.org
Signed-off-by: SeongJae Park 
Signed-off-by: Andrew Morton

mm/damon/tests/core-kunit: remove a redundant test case and add a new test case in damos_test_commit_quota_goal()

2026-01-21T03:24:54+00:00

Remove a redundant test case from damos_test_commit_quota_goal() as it is
already covered.  Instead, add a new test for DAMOS_QUOTA_SOME_MEM_PSI_US,
which was previously not tested.

Link: https://lkml.kernel.org/r/20251224042200.2061847-6-shu17az@gmail.com
Signed-off-by: Shu Anzai 
Reviewed-by: SeongJae Park 
Signed-off-by: Andrew Morton

mm/damon/tests/core-kunit: add test cases for multiple regions in damon_test_split_regions_of()

2026-01-21T03:24:53+00:00

Extend damon_test_split_regions_of() to verify that it correctly handles
multiple regions with various 'min_sz_region'.

[sj@kernel.org: remove braces in damon_test_split_regions_of()]
  Link: https://lkml.kernel.org/r/20251224153125.69194-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20251224042200.2061847-5-shu17az@gmail.com
Signed-off-by: Shu Anzai 
Reviewed-by: SeongJae Park 
Signed-off-by: Andrew Morton

mm/damon/tests/core-kunit: add a test case for region merge size limit in damon_test_merge_regions_of()

2026-01-21T03:24:53+00:00

Add a test case in damon_test_merge_regions_of() to verify that two
adjacent regions are not merged if the resulting region would exceed the
specified size limit.

Link: https://lkml.kernel.org/r/20251224042200.2061847-4-shu17az@gmail.com
Signed-off-by: Shu Anzai 
Reviewed-by: SeongJae Park 
Signed-off-by: Andrew Morton

mm/damon/tests/core-kunit: verify the 'age' and 'nr_accesses_bp' fields in damon_test_merge_two()

2026-01-21T03:24:53+00:00

Extend damon_test_merge_two() to verify the 'age' and 'nr_accesses_bp'
fields.

Link: https://lkml.kernel.org/r/20251224042200.2061847-3-shu17az@gmail.com
Signed-off-by: Shu Anzai 
Reviewed-by: SeongJae Park 
Signed-off-by: Andrew Morton

mm/damon/tests/core-kunit: verify the 'age' field in damon_test_split_at()

2026-01-21T03:24:53+00:00

Patch series "mm/damon/tests/core-kunit: extend existing test scenarios",
v2.

Improve the KUnit test coverage for DAMON. 

The five patches in this series respectively extend damon_test_split_at(),
damon_test_merge_two(), damon_test_merge_regions_of(),
damon_test_split_regions_of(), and damos_test_commit_quota_goal().


This patch (of 5):

Extend damon_test_split_at() to verify the 'age' field.

Link: https://lkml.kernel.org/r/20251224042200.2061847-1-shu17az@gmail.com
Link: https://lkml.kernel.org/r/20251224042200.2061847-2-shu17az@gmail.com
Signed-off-by: Shu Anzai 
Reviewed-by: SeongJae Park 
Signed-off-by: Andrew Morton

mm/damon: fix typos in comments

2026-01-21T03:24:48+00:00

Correct minor spelling mistakes in several files under mm/damon.  No
functional changes.

Link: https://lkml.kernel.org/r/20251217181216.47576-1-klourencodev@gmail.com
Signed-off-by: Kevin Lourenco 
Reviewed-by: SeongJae Park 
Signed-off-by: Andrew Morton