mm/damon/tests/core-kunit: test goal_tuner commit

Extend damos_commit_quota() kunit test for the newly added goal_tuner
parameter.

Link: https://lkml.kernel.org/r/20260310010529.91162-9-sj@kernel.o

mm/damon/tests/core-kunit: test goal_tuner commit

Extend damos_commit_quota() kunit test for the newly added goal_tuner
parameter.

Link: https://lkml.kernel.org/r/20260310010529.91162-9-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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mm/damon/tests/core-kunit: add a test for damon_is_last_region()

There was a bug [1] in damon_is_last_region(). Add a kunit test to not
reintroduce the bug.

Link: https://lkml.kernel.org/r/2026030

mm/damon/tests/core-kunit: add a test for damon_is_last_region()

There was a bug [1] in damon_is_last_region(). Add a kunit test to not
reintroduce the bug.

Link: https://lkml.kernel.org/r/20260307195356.203753-3-sj@kernel.org
Link: https://lore.kernel.org/20260114152049.99727-1-sj@kernel.org/ [1]
Signed-off-by: SeongJae Park <sj@kernel.org>
Tested-by: wang lian <lianux.mm@gmail.com>
Reviewed-by: wang lian <lianux.mm@gmail.com>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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mm/damon/tests/core-kunit: add a test for damon_commit_ctx()

Patch series "mm/damon: test and document power-of-2 min_region_sz
requirement".

Since commit c80f46ac228b ("mm/damon/core: disallow non

mm/damon/tests/core-kunit: add a test for damon_commit_ctx()

Patch series "mm/damon: test and document power-of-2 min_region_sz
requirement".

Since commit c80f46ac228b ("mm/damon/core: disallow non-power of two
min_region_sz"), min_region_sz is always restricted to be a power of two.
Add a kunit test to confirm the functionality. Also, the change adds a
restriction to addr_unit parameter. Clarify it on the document.


This patch (of 2):

Add a kunit test for confirming the change that is made on commit
c80f46ac228b ("mm/damon/core: disallow non-power of two min_region_sz")
functions as expected.

Link: https://lkml.kernel.org/r/20260307194222.202075-2-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: SeongJae Park <sj@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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mm/damon/tests/.kunitconifg: enable DAMON_DEBUG_SANITY

CONFIG_DAMON_DEBUG_SANITY is recommended for DAMON development and test
setups. Enable it on the default configurations for DAMON kunit test r

mm/damon/tests/.kunitconifg: enable DAMON_DEBUG_SANITY

CONFIG_DAMON_DEBUG_SANITY is recommended for DAMON development and test
setups. Enable it on the default configurations for DAMON kunit test run.

Link: https://lkml.kernel.org/r/20260306152914.86303-10-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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mm/damon/test/core-kunit: add damon_apply_min_nr_regions() test

Add a kunit test for the functionality of damon_apply_min_nr_regions().

Link: https://lkml.kernel.org/r/20260228222831.7232-4-sj@kern

mm/damon/test/core-kunit: add damon_apply_min_nr_regions() test

Add a kunit test for the functionality of damon_apply_min_nr_regions().

Link: https://lkml.kernel.org/r/20260228222831.7232-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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mm/damon/vaddr: do not split regions for min_nr_regions

The previous commit made DAMON core split regions at the beginning for
min_nr_regions. The virtual address space operation set (vaddr) does
s

mm/damon/vaddr: do not split regions for min_nr_regions

The previous commit made DAMON core split regions at the beginning for
min_nr_regions. The virtual address space operation set (vaddr) does
similar work on its own, for a case user delegates entire initial
monitoring regions setup to vaddr. It is unnecessary now, as DAMON core
will do similar work for any case. Remove the duplicated work in vaddr.

Also, remove a helper function that was being used only for the work, and
the test code of the helper function.

Link: https://lkml.kernel.org/r/20260228222831.7232-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

Conversion performed via this Coccinelle script:

// SPDX-License-Identifier: GPL-2.0-only
// Options: --include-headers-for-types -

Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

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 <kees@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

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

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

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 <torvalds@linux-foundation.org>

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