f2fs: introduce struct flush_cmd_control to wrap the flush_merge fields
Split the flush_merge fields from sm_i, and use the new struct flush_cmd_control
to wrap it, so that we can igonre these fileds if flush_merge is disable, and
it alse can the structs more neat.
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index f6816e1..9ac4f86 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -200,20 +200,20 @@
int issue_flush_thread(void *data)
{
struct f2fs_sb_info *sbi = data;
- struct f2fs_sm_info *sm_i = SM_I(sbi);
- wait_queue_head_t *q = &sm_i->flush_wait_queue;
+ struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
+ wait_queue_head_t *q = &fcc->flush_wait_queue;
repeat:
if (kthread_should_stop())
return 0;
- spin_lock(&sm_i->issue_lock);
- if (sm_i->issue_list) {
- sm_i->dispatch_list = sm_i->issue_list;
- sm_i->issue_list = sm_i->issue_tail = NULL;
+ spin_lock(&fcc->issue_lock);
+ if (fcc->issue_list) {
+ fcc->dispatch_list = fcc->issue_list;
+ fcc->issue_list = fcc->issue_tail = NULL;
}
- spin_unlock(&sm_i->issue_lock);
+ spin_unlock(&fcc->issue_lock);
- if (sm_i->dispatch_list) {
+ if (fcc->dispatch_list) {
struct bio *bio = bio_alloc(GFP_NOIO, 0);
struct flush_cmd *cmd, *next;
int ret;
@@ -221,22 +221,23 @@
bio->bi_bdev = sbi->sb->s_bdev;
ret = submit_bio_wait(WRITE_FLUSH, bio);
- for (cmd = sm_i->dispatch_list; cmd; cmd = next) {
+ for (cmd = fcc->dispatch_list; cmd; cmd = next) {
cmd->ret = ret;
next = cmd->next;
complete(&cmd->wait);
}
bio_put(bio);
- sm_i->dispatch_list = NULL;
+ fcc->dispatch_list = NULL;
}
- wait_event_interruptible(*q, kthread_should_stop() || sm_i->issue_list);
+ wait_event_interruptible(*q,
+ kthread_should_stop() || fcc->issue_list);
goto repeat;
}
int f2fs_issue_flush(struct f2fs_sb_info *sbi)
{
- struct f2fs_sm_info *sm_i = SM_I(sbi);
+ struct flush_cmd_control *fcc = SM_I(sbi)->cmd_control_info;
struct flush_cmd *cmd;
int ret;
@@ -246,16 +247,16 @@
cmd = f2fs_kmem_cache_alloc(flush_cmd_slab, GFP_ATOMIC | __GFP_ZERO);
init_completion(&cmd->wait);
- spin_lock(&sm_i->issue_lock);
- if (sm_i->issue_list)
- sm_i->issue_tail->next = cmd;
+ spin_lock(&fcc->issue_lock);
+ if (fcc->issue_list)
+ fcc->issue_tail->next = cmd;
else
- sm_i->issue_list = cmd;
- sm_i->issue_tail = cmd;
- spin_unlock(&sm_i->issue_lock);
+ fcc->issue_list = cmd;
+ fcc->issue_tail = cmd;
+ spin_unlock(&fcc->issue_lock);
- if (!sm_i->dispatch_list)
- wake_up(&sm_i->flush_wait_queue);
+ if (!fcc->dispatch_list)
+ wake_up(&fcc->flush_wait_queue);
wait_for_completion(&cmd->wait);
ret = cmd->ret;
@@ -1873,12 +1874,22 @@
sm_info->max_discards = 0;
if (test_opt(sbi, FLUSH_MERGE) && !f2fs_readonly(sbi->sb)) {
- spin_lock_init(&sm_info->issue_lock);
- init_waitqueue_head(&sm_info->flush_wait_queue);
- sm_info->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
+ struct flush_cmd_control *fcc =
+ kzalloc(sizeof(struct flush_cmd_control), GFP_KERNEL);
+
+ if (!fcc)
+ return -ENOMEM;
+ spin_lock_init(&fcc->issue_lock);
+ init_waitqueue_head(&fcc->flush_wait_queue);
+
+ fcc->f2fs_issue_flush = kthread_run(issue_flush_thread, sbi,
"f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
- if (IS_ERR(sm_info->f2fs_issue_flush))
- return PTR_ERR(sm_info->f2fs_issue_flush);
+ if (IS_ERR(fcc->f2fs_issue_flush)) {
+ err = PTR_ERR(fcc->f2fs_issue_flush);
+ kfree(fcc);
+ return err;
+ }
+ sm_info->cmd_control_info = fcc;
}
err = build_sit_info(sbi);
@@ -1987,10 +1998,14 @@
void destroy_segment_manager(struct f2fs_sb_info *sbi)
{
struct f2fs_sm_info *sm_info = SM_I(sbi);
+ struct flush_cmd_control *fcc;
+
if (!sm_info)
return;
- if (sm_info->f2fs_issue_flush)
- kthread_stop(sm_info->f2fs_issue_flush);
+ fcc = sm_info->cmd_control_info;
+ if (fcc && fcc->f2fs_issue_flush)
+ kthread_stop(fcc->f2fs_issue_flush);
+ kfree(fcc);
destroy_dirty_segmap(sbi);
destroy_curseg(sbi);
destroy_free_segmap(sbi);