From: Yu Kuai <yukuai3@xxxxxxxxxx>
This helper is used to check if blocks can be skipped before calling
into pers->sync_request(), llbiltmap will use this helper to skip
resync for unwritten/clean data blocks, and recovery/check/repair for
unwritten data blocks;
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
drivers/md/md-bitmap.h | 1 +
drivers/md/md.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index 41d09c6d0c14..13be2a10801a 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -99,6 +99,7 @@ struct bitmap_operations {
void (*end_discard)(struct mddev *mddev, sector_t offset,
unsigned long sectors);
+ sector_t (*skip_sync_blocks)(struct mddev *mddev, sector_t offset);
bool (*start_sync)(struct mddev *mddev, sector_t offset,
sector_t *blocks, bool degraded);
void (*end_sync)(struct mddev *mddev, sector_t offset, sector_t *blocks);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 4329ecfbe8ff..c23ee9c19cf9 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -9370,6 +9370,12 @@ void md_do_sync(struct md_thread *thread)
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
break;
+ if (mddev->bitmap_ops && mddev->bitmap_ops->skip_sync_blocks) {
+ sectors = mddev->bitmap_ops->skip_sync_blocks(mddev, j);
+ if (sectors)
+ goto update;
+ }
+
sectors = mddev->pers->sync_request(mddev, j, max_sectors,
&skipped);
if (sectors == 0) {
@@ -9385,6 +9391,7 @@ void md_do_sync(struct md_thread *thread)
if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
break;
+update:
j += sectors;
if (j > max_sectors)
/* when skipping, extra large numbers can be returned. */
--
2.39.2
