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f2fs: cleanup waiting routine for writeback pages in cp

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use genernal method supported by kernel

 o changes from v1
   If any waiter exists at end io, wake up it.

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Changman Lee 2013-11-07 12:48:25 +09:00 committed by Jaegeuk Kim
parent 3b03f72445
commit fb51b5ef9c
4 changed files with 21 additions and 12 deletions
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25
fs/f2fs/checkpoint.c
View File

@ -634,6 +634,21 @@ static void unblock_operations(struct f2fs_sb_info *sbi)
f2fs_unlock_all(sbi);
}
static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
{
DEFINE_WAIT(wait);
for (;;) {
prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
if (!get_pages(sbi, F2FS_WRITEBACK))
break;
io_schedule();
}
finish_wait(&sbi->cp_wait, &wait);
}
static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
@ -743,15 +758,7 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount)
f2fs_put_page(cp_page, 1);
/* wait for previous submitted node/meta pages writeback */
sbi->cp_task = current;
while (get_pages(sbi, F2FS_WRITEBACK)) {
set_current_state(TASK_UNINTERRUPTIBLE);
if (!get_pages(sbi, F2FS_WRITEBACK))
break;
io_schedule();
}
__set_current_state(TASK_RUNNING);
sbi->cp_task = NULL;
wait_on_all_pages_writeback(sbi);
filemap_fdatawait_range(sbi->node_inode->i_mapping, 0, LONG_MAX);
filemap_fdatawait_range(sbi->meta_inode->i_mapping, 0, LONG_MAX);

2
fs/f2fs/f2fs.h
View File

@ -372,7 +372,7 @@ struct f2fs_sb_info {
struct mutex writepages; /* mutex for writepages() */
bool por_doing; /* recovery is doing or not */
bool on_build_free_nids; /* build_free_nids is doing */
struct task_struct *cp_task; /* checkpoint task */
wait_queue_head_t cp_wait;
/* for orphan inode management */
struct list_head orphan_inode_list; /* orphan inode list */

5
fs/f2fs/segment.c
View File

@ -592,8 +592,9 @@ static void f2fs_end_io_write(struct bio *bio, int err)
if (p->is_sync)
complete(p->wait);
if (!get_pages(p->sbi, F2FS_WRITEBACK) && p->sbi->cp_task)
wake_up_process(p->sbi->cp_task);
if (!get_pages(p->sbi, F2FS_WRITEBACK) &&
!list_empty(&p->sbi->cp_wait.task_list))
wake_up(&p->sbi->cp_wait);
kfree(p);
bio_put(bio);

1
fs/f2fs/super.c
View File

@ -876,6 +876,7 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
spin_lock_init(&sbi->stat_lock);
init_rwsem(&sbi->bio_sem);
init_rwsem(&sbi->cp_rwsem);
init_waitqueue_head(&sbi->cp_wait);
init_sb_info(sbi);
/* get an inode for meta space */