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authorJaegeuk Kim <jaegeuk@kernel.org>2014-10-28 22:27:59 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2014-11-04 17:34:13 -0800
commitadf4983bde9c07c074be12eadb040a88479aa421 (patch)
tree3b383320c386a792c78073600ef410129a6a06ef /fs/f2fs/segment.c
parentb3d208f96d6bb21247108a956dead6a028d5cdb2 (diff)
f2fs: send discard commands in larger extent
If there is a chance to make a huge sized discard command, we don't need to split it out, since each blkdev_issue_discard should wait one at a time. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.c')
-rw-r--r--fs/f2fs/segment.c44
1 files changed, 27 insertions, 17 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 06dda733f958..2fb3d7f71c4e 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -469,10 +469,33 @@ void discard_next_dnode(struct f2fs_sb_info *sbi, block_t blkaddr)
}
}
-static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+static void __add_discard_entry(struct f2fs_sb_info *sbi,
+ struct cp_control *cpc, unsigned int start, unsigned int end)
{
struct list_head *head = &SM_I(sbi)->discard_list;
- struct discard_entry *new;
+ struct discard_entry *new, *last;
+
+ if (!list_empty(head)) {
+ last = list_last_entry(head, struct discard_entry, list);
+ if (START_BLOCK(sbi, cpc->trim_start) + start ==
+ last->blkaddr + last->len) {
+ last->len += end - start;
+ goto done;
+ }
+ }
+
+ new = f2fs_kmem_cache_alloc(discard_entry_slab, GFP_NOFS);
+ INIT_LIST_HEAD(&new->list);
+ new->blkaddr = START_BLOCK(sbi, cpc->trim_start) + start;
+ new->len = end - start;
+ list_add_tail(&new->list, head);
+done:
+ SM_I(sbi)->nr_discards += end - start;
+ cpc->trimmed += end - start;
+}
+
+static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
+{
int entries = SIT_VBLOCK_MAP_SIZE / sizeof(unsigned long);
int max_blocks = sbi->blocks_per_seg;
struct seg_entry *se = get_seg_entry(sbi, cpc->trim_start);
@@ -501,13 +524,7 @@ static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
}
mutex_unlock(&dirty_i->seglist_lock);
- new = f2fs_kmem_cache_alloc(discard_entry_slab, GFP_NOFS);
- INIT_LIST_HEAD(&new->list);
- new->blkaddr = START_BLOCK(sbi, cpc->trim_start);
- new->len = sbi->blocks_per_seg;
- list_add_tail(&new->list, head);
- SM_I(sbi)->nr_discards += sbi->blocks_per_seg;
- cpc->trimmed += sbi->blocks_per_seg;
+ __add_discard_entry(sbi, cpc, 0, sbi->blocks_per_seg);
return;
}
@@ -529,14 +546,7 @@ static void add_discard_addrs(struct f2fs_sb_info *sbi, struct cp_control *cpc)
if (end - start < cpc->trim_minlen)
continue;
- new = f2fs_kmem_cache_alloc(discard_entry_slab, GFP_NOFS);
- INIT_LIST_HEAD(&new->list);
- new->blkaddr = START_BLOCK(sbi, cpc->trim_start) + start;
- new->len = end - start;
- cpc->trimmed += end - start;
-
- list_add_tail(&new->list, head);
- SM_I(sbi)->nr_discards += end - start;
+ __add_discard_entry(sbi, cpc, start, end);
}
}