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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>
This commit is contained in:
Gu Zheng 2014-04-27 14:21:21 +08:00 committed by Jaegeuk Kim
parent 6403eb1f64
commit a688b9d9e5
3 changed files with 77 additions and 53 deletions
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17
fs/f2fs/f2fs.h
View File

@ -325,6 +325,15 @@ struct flush_cmd {
int ret;
};
struct flush_cmd_control {
struct task_struct *f2fs_issue_flush; /* flush thread */
wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */
struct flush_cmd *issue_list; /* list for command issue */
struct flush_cmd *dispatch_list; /* list for command dispatch */
spinlock_t issue_lock; /* for issue list lock */
struct flush_cmd *issue_tail; /* list tail of issue list */
};
struct f2fs_sm_info {
struct sit_info *sit_info; /* whole segment information */
struct free_segmap_info *free_info; /* free segment information */
@ -355,12 +364,8 @@ struct f2fs_sm_info {
unsigned int min_ipu_util; /* in-place-update threshold */
/* for flush command control */
struct task_struct *f2fs_issue_flush; /* flush thread */
wait_queue_head_t flush_wait_queue; /* waiting queue for wake-up */
struct flush_cmd *issue_list; /* list for command issue */
struct flush_cmd *dispatch_list; /* list for command dispatch */
spinlock_t issue_lock; /* for issue list lock */
struct flush_cmd *issue_tail; /* list tail of issue list */
struct flush_cmd_control *cmd_control_info;
};
/*

69
fs/f2fs/segment.c
View File

@ -200,20 +200,20 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
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 @@ repeat:
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 @@ int f2fs_issue_flush(struct f2fs_sb_info *sbi)
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 @@ int build_segment_manager(struct f2fs_sb_info *sbi)
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 @@ static void destroy_sit_info(struct f2fs_sb_info *sbi)
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);

44
fs/f2fs/super.c
View File

@ -641,29 +641,33 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
* or if flush_merge is not passed in mount option.
*/
if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
struct f2fs_sm_info *sm_info = sbi->sm_info;
struct flush_cmd_control *fcc =
sbi->sm_info->cmd_control_info;
if (sm_info->f2fs_issue_flush)
kthread_stop(sm_info->f2fs_issue_flush);
sm_info->issue_list = sm_info->dispatch_list = NULL;
sm_info->f2fs_issue_flush = NULL;
} else if (test_opt(sbi, FLUSH_MERGE)) {
struct f2fs_sm_info *sm_info = sbi->sm_info;
if (fcc && fcc->f2fs_issue_flush)
kthread_stop(fcc->f2fs_issue_flush);
kfree(fcc);
sbi->sm_info->cmd_control_info = NULL;
} else if (test_opt(sbi, FLUSH_MERGE) &&
!sbi->sm_info->cmd_control_info) {
dev_t dev = sbi->sb->s_bdev->bd_dev;
struct flush_cmd_control *fcc =
kzalloc(sizeof(struct flush_cmd_control), GFP_KERNEL);
if (!sm_info->f2fs_issue_flush) {
dev_t dev = sbi->sb->s_bdev->bd_dev;
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,
"f2fs_flush-%u:%u", MAJOR(dev), MINOR(dev));
if (IS_ERR(sm_info->f2fs_issue_flush)) {
err = PTR_ERR(sm_info->f2fs_issue_flush);
sm_info->f2fs_issue_flush = NULL;
goto restore_gc;
}
if (!fcc) {
err = -ENOMEM;
goto restore_gc;
}
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(fcc->f2fs_issue_flush)) {
err = PTR_ERR(fcc->f2fs_issue_flush);
kfree(fcc);
goto restore_gc;
}
sbi->sm_info->cmd_control_info = fcc;
}
skip:
/* Update the POSIXACL Flag */