f2fs: relax async discard commands more
This patch relaxes async discard commands to avoid waiting its end_io during
checkpoint.
Instead of waiting them during checkpoint, it will be done when actually reusing
them.
Test on initial partition of nvme drive.
# time fstrim /mnt/test
Before : 6.158s
After : 4.822s
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 9cabe93..44d69f9 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -625,20 +625,23 @@ static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
}
static struct bio_entry *__add_bio_entry(struct f2fs_sb_info *sbi,
- struct bio *bio)
+ struct bio *bio, block_t lstart, block_t len)
{
struct list_head *wait_list = &(SM_I(sbi)->wait_list);
struct bio_entry *be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS);
INIT_LIST_HEAD(&be->list);
be->bio = bio;
+ be->lstart = lstart;
+ be->len = len;
init_completion(&be->event);
list_add_tail(&be->list, wait_list);
return be;
}
-void f2fs_wait_all_discard_bio(struct f2fs_sb_info *sbi)
+/* This should be covered by global mutex, &sit_i->sentry_lock */
+void f2fs_wait_discard_bio(struct f2fs_sb_info *sbi, block_t blkaddr)
{
struct list_head *wait_list = &(SM_I(sbi)->wait_list);
struct bio_entry *be, *tmp;
@@ -647,7 +650,15 @@ void f2fs_wait_all_discard_bio(struct f2fs_sb_info *sbi)
struct bio *bio = be->bio;
int err;
- wait_for_completion_io(&be->event);
+ if (!completion_done(&be->event)) {
+ if ((be->lstart <= blkaddr &&
+ blkaddr < be->lstart + be->len) ||
+ blkaddr == NULL_ADDR)
+ wait_for_completion_io(&be->event);
+ else
+ continue;
+ }
+
err = be->error;
if (err == -EOPNOTSUPP)
err = 0;
@@ -675,6 +686,7 @@ static int __f2fs_issue_discard_async(struct f2fs_sb_info *sbi,
struct block_device *bdev, block_t blkstart, block_t blklen)
{
struct bio *bio = NULL;
+ block_t lblkstart = blkstart;
int err;
trace_f2fs_issue_discard(sbi->sb, blkstart, blklen);
@@ -689,14 +701,14 @@ static int __f2fs_issue_discard_async(struct f2fs_sb_info *sbi,
SECTOR_FROM_BLOCK(blklen),
GFP_NOFS, 0, &bio);
if (!err && bio) {
- struct bio_entry *be = __add_bio_entry(sbi, bio);
+ struct bio_entry *be = __add_bio_entry(sbi, bio,
+ lblkstart, blklen);
bio->bi_private = be;
bio->bi_end_io = f2fs_submit_bio_wait_endio;
bio->bi_opf |= REQ_SYNC;
submit_bio(bio);
}
-
return err;
}
@@ -1575,6 +1587,8 @@ void allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
*new_blkaddr = NEXT_FREE_BLKADDR(sbi, curseg);
+ f2fs_wait_discard_bio(sbi, *new_blkaddr);
+
/*
* __add_sum_entry should be resided under the curseg_mutex
* because, this function updates a summary entry in the