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New map #286

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6ba3b5c
Add an index-based chained map to metadata management
akiradeveloper Oct 26, 2026
45df748
Integrate the indexed map into RAM metadata management
akiradeveloper Oct 26, 2026
3deec00
Remove the obsolete large_array wrapper
akiradeveloper Oct 26, 2026
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4 changes: 2 additions & 2 deletions src/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ dm-writeboost-objs := \
dm-writeboost-daemon.o

all:
$(MAKE) -C $(KERNEL_TREE) M=$(PWD) modules
$(MAKE) -C $(KERNEL_TREE) M=$(CURDIR) modules

clean:
$(MAKE) -C $(KERNEL_TREE) M=$(PWD) clean
$(MAKE) -C $(KERNEL_TREE) M=$(CURDIR) clean
15 changes: 8 additions & 7 deletions src/dm-writeboost-daemon.c
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Original file line number Diff line number Diff line change
Expand Up @@ -115,7 +115,7 @@ static void do_flush_proc(struct wb_device *wb)
};
region = (struct dm_io_region) {
.bdev = wb->cache_dev->bdev,
.sector = seg->start_sector,
.sector = segment_start_sector(wb, seg),
.count = (seg->length + 1) << 3,
};

Expand Down Expand Up @@ -297,7 +297,7 @@ static int fill_writeback_seg(struct wb_device *wb, struct writeback_segment *wr
};
struct dm_io_region region_r = {
.bdev = wb->cache_dev->bdev,
.sector = seg->start_sector + (1 << 3), /* Header excluded */
.sector = segment_start_sector(wb, seg) + (1 << 3), /* Header excluded */
.count = seg->length << 3,
};

Expand All @@ -317,14 +317,14 @@ static void prepare_writeback_ios(struct wb_device *wb, struct writeback_segment
for (i = 0; i < seg->length; i++) {
struct writeback_io *writeback_io;

struct metablock *mb = seg->mb_array + i;
struct dirtiness dirtiness = read_mb_dirtiness(wb, seg, mb);
u32 cache_idx = segment_start_idx(wb, seg) + i;
struct dirtiness dirtiness = read_mb_dirtiness(wb, seg, cache_idx);
ASSERT(dirtiness.data_bits > 0);
if (!dirtiness.is_dirty)
continue;

writeback_io = writeback_seg->ios + i;
writeback_io->sector = mb->sector;
writeback_io->sector = cache_sector(wb, cache_idx);
writeback_io->id = seg->id;
/* writeback_io->data is already set */
writeback_io->data_bits = dirtiness.data_bits;
Expand All @@ -338,8 +338,9 @@ void mark_clean_seg(struct wb_device *wb, struct segment_header *seg)
{
u8 i;
for (i = 0; i < seg->length; i++) {
struct metablock *mb = seg->mb_array + i;
if (mark_clean_mb(wb, mb))
u32 cache_idx = segment_start_idx(wb, seg) + i;

if (mark_clean_mb(wb, cache_idx))
dec_nr_dirty_caches(wb);
}
}
Expand Down
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