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f2fs: send discard commands in larger extent

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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>
This commit is contained in:
Jaegeuk Kim 2014-10-28 22:27:59 -07:00
parent b3d208f96d
commit adf4983bde
1 changed files with 27 additions and 17 deletions
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44
fs/f2fs/segment.c
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@ -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);
}
}