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Date: Wed, 16 Mar 2022 00:37:05 +0800
From: Xin Hao <xhao@...ux.alibaba.com>
To: sj@...nel.org
Cc: xhao@...ux.alibaba.com, rongwei.wang@...ux.alibaba.com,
akpm@...ux-foundation.org, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: [RFC PATCH V1 1/3] mm/damon: rename damon_evenly_split_region()
This patch rename damon_va_evenly_split_region() to
damon_evenly_split_region() is aimed to call it
in the physical address space.
So there fix it, and move it to "ops-common.c" file.
Signed-off-by: Xin Hao <xhao@...ux.alibaba.com>
---
mm/damon/ops-common.c | 39 +++++++++++++++++++++++++++++++++++++++
mm/damon/ops-common.h | 3 +++
mm/damon/vaddr-test.h | 6 +++---
mm/damon/vaddr.c | 41 +----------------------------------------
4 files changed, 46 insertions(+), 43 deletions(-)
diff --git a/mm/damon/ops-common.c b/mm/damon/ops-common.c
index e346cc10d143..fd5e98005358 100644
--- a/mm/damon/ops-common.c
+++ b/mm/damon/ops-common.c
@@ -131,3 +131,42 @@ int damon_pageout_score(struct damon_ctx *c, struct damon_region *r,
/* Return coldness of the region */
return DAMOS_MAX_SCORE - hotness;
}
+
+/*
+ * Size-evenly split a region into 'nr_pieces' small regions
+ *
+ * Returns 0 on success, or negative error code otherwise.
+ */
+int damon_evenly_split_region(struct damon_target *t,
+ struct damon_region *r, unsigned int nr_pieces)
+{
+ unsigned long sz_orig, sz_piece, orig_end;
+ struct damon_region *n = NULL, *next;
+ unsigned long start;
+
+ if (!r || !nr_pieces)
+ return -EINVAL;
+
+ orig_end = r->ar.end;
+ sz_orig = r->ar.end - r->ar.start;
+ sz_piece = ALIGN_DOWN(sz_orig / nr_pieces, DAMON_MIN_REGION);
+
+ if (!sz_piece)
+ return -EINVAL;
+
+ r->ar.end = r->ar.start + sz_piece;
+ next = damon_next_region(r);
+ for (start = r->ar.end; start + sz_piece <= orig_end;
+ start += sz_piece) {
+ n = damon_new_region(start, start + sz_piece);
+ if (!n)
+ return -ENOMEM;
+ damon_insert_region(n, r, next, t);
+ r = n;
+ }
+ /* complement last region for possible rounding error */
+ if (n)
+ n->ar.end = orig_end;
+
+ return 0;
+}
diff --git a/mm/damon/ops-common.h b/mm/damon/ops-common.h
index e790cb5f8fe0..fd441016a2ae 100644
--- a/mm/damon/ops-common.h
+++ b/mm/damon/ops-common.h
@@ -14,3 +14,6 @@ void damon_pmdp_mkold(pmd_t *pmd, struct mm_struct *mm, unsigned long addr);
int damon_pageout_score(struct damon_ctx *c, struct damon_region *r,
struct damos *s);
+
+int damon_evenly_split_region(struct damon_target *t,
+ struct damon_region *r, unsigned int nr_pieces);
diff --git a/mm/damon/vaddr-test.h b/mm/damon/vaddr-test.h
index 1a55bb6c36c3..161906ab66a7 100644
--- a/mm/damon/vaddr-test.h
+++ b/mm/damon/vaddr-test.h
@@ -256,7 +256,7 @@ static void damon_test_split_evenly_fail(struct kunit *test,
damon_add_region(r, t);
KUNIT_EXPECT_EQ(test,
- damon_va_evenly_split_region(t, r, nr_pieces), -EINVAL);
+ damon_evenly_split_region(t, r, nr_pieces), -EINVAL);
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1u);
damon_for_each_region(r, t) {
@@ -277,7 +277,7 @@ static void damon_test_split_evenly_succ(struct kunit *test,
damon_add_region(r, t);
KUNIT_EXPECT_EQ(test,
- damon_va_evenly_split_region(t, r, nr_pieces), 0);
+ damon_evenly_split_region(t, r, nr_pieces), 0);
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), nr_pieces);
damon_for_each_region(r, t) {
@@ -294,7 +294,7 @@ static void damon_test_split_evenly_succ(struct kunit *test,
static void damon_test_split_evenly(struct kunit *test)
{
- KUNIT_EXPECT_EQ(test, damon_va_evenly_split_region(NULL, NULL, 5),
+ KUNIT_EXPECT_EQ(test, damon_evenly_split_region(NULL, NULL, 5),
-EINVAL);
damon_test_split_evenly_fail(test, 0, 100, 0);
diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index b2ec0aa1ff45..0870e178b1b8 100644
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c
@@ -56,45 +56,6 @@ static struct mm_struct *damon_get_mm(struct damon_target *t)
* Functions for the initial monitoring target regions construction
*/
-/*
- * Size-evenly split a region into 'nr_pieces' small regions
- *
- * Returns 0 on success, or negative error code otherwise.
- */
-static int damon_va_evenly_split_region(struct damon_target *t,
- struct damon_region *r, unsigned int nr_pieces)
-{
- unsigned long sz_orig, sz_piece, orig_end;
- struct damon_region *n = NULL, *next;
- unsigned long start;
-
- if (!r || !nr_pieces)
- return -EINVAL;
-
- orig_end = r->ar.end;
- sz_orig = r->ar.end - r->ar.start;
- sz_piece = ALIGN_DOWN(sz_orig / nr_pieces, DAMON_MIN_REGION);
-
- if (!sz_piece)
- return -EINVAL;
-
- r->ar.end = r->ar.start + sz_piece;
- next = damon_next_region(r);
- for (start = r->ar.end; start + sz_piece <= orig_end;
- start += sz_piece) {
- n = damon_new_region(start, start + sz_piece);
- if (!n)
- return -ENOMEM;
- damon_insert_region(n, r, next, t);
- r = n;
- }
- /* complement last region for possible rounding error */
- if (n)
- n->ar.end = orig_end;
-
- return 0;
-}
-
static unsigned long sz_range(struct damon_addr_range *r)
{
return r->end - r->start;
@@ -265,7 +226,7 @@ static void __damon_va_init_regions(struct damon_ctx *ctx,
damon_add_region(r, t);
nr_pieces = (regions[i].end - regions[i].start) / sz;
- damon_va_evenly_split_region(t, r, nr_pieces);
+ damon_evenly_split_region(t, r, nr_pieces);
}
}
--
2.27.0
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