diff options
| -rw-r--r-- | fs/ext4/ext4.h | 1 | ||||
| -rw-r--r-- | fs/ext4/fsync.c | 2 | ||||
| -rw-r--r-- | fs/ext4/page-io.c | 9 |
3 files changed, 10 insertions, 2 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 6481e3c..37e7d8b 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -185,6 +185,7 @@ struct mpage_da_data { #define EXT4_IO_END_ERROR 0x0002 #define EXT4_IO_END_QUEUED 0x0004 #define EXT4_IO_END_DIRECT 0x0008 +#define EXT4_IO_END_IN_FSYNC 0x0010 struct ext4_io_page { struct page *p_page; diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c index 00a2cb7..bb6c7d8 100644 --- a/fs/ext4/fsync.c +++ b/fs/ext4/fsync.c @@ -89,6 +89,7 @@ int ext4_flush_completed_IO(struct inode *inode) io = list_entry(ei->i_completed_io_list.next, ext4_io_end_t, list); list_del_init(&io->list); + io->flag |= EXT4_IO_END_IN_FSYNC; /* * Calling ext4_end_io_nolock() to convert completed * IO to written. @@ -108,6 +109,7 @@ int ext4_flush_completed_IO(struct inode *inode) if (ret < 0) ret2 = ret; spin_lock_irqsave(&ei->i_completed_io_lock, flags); + io->flag &= ~EXT4_IO_END_IN_FSYNC; } spin_unlock_irqrestore(&ei->i_completed_io_lock, flags); return (ret2 < 0) ? ret2 : 0; diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 9e1b8eb..dcdeef1 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -129,12 +129,18 @@ static void ext4_end_io_work(struct work_struct *work) unsigned long flags; spin_lock_irqsave(&ei->i_completed_io_lock, flags); + if (io->flag & EXT4_IO_END_IN_FSYNC) + goto requeue; if (list_empty(&io->list)) { spin_unlock_irqrestore(&ei->i_completed_io_lock, flags); goto free; } if (!mutex_trylock(&inode->i_mutex)) { + bool was_queued; +requeue: + was_queued = !!(io->flag & EXT4_IO_END_QUEUED); + io->flag |= EXT4_IO_END_QUEUED; spin_unlock_irqrestore(&ei->i_completed_io_lock, flags); /* * Requeue the work instead of waiting so that the work @@ -147,9 +153,8 @@ static void ext4_end_io_work(struct work_struct *work) * yield the cpu if it sees an end_io request that has already * been requeued. */ - if (io->flag & EXT4_IO_END_QUEUED) + if (was_queued) yield(); - io->flag |= EXT4_IO_END_QUEUED; return; } list_del_init(&io->list); |