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writeback: Drop I_DIRTY_TIME_EXPIRE 

The only use of I_DIRTY_TIME_EXPIRE is to detect in
__writeback_single_inode() that inode got there because flush worker
decided it's time to writeback the dirty inode time stamps (either
because we are syncing or because of age). However we can detect this
directly in __writeback_single_inode() and there's no need for the
strange propagation with I_DIRTY_TIME_EXPIRE flag.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2020-05-29 16:24:43 +02:00
parent f9cae926f3
commit 5fcd57505c
5 changed files with 14 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/ext4/inode.c
View File

@ -4887,7 +4887,7 @@ static void __ext4_update_other_inode_time(struct super_block *sb,
(inode->i_state & I_DIRTY_TIME)) {
struct ext4_inode_info *ei = EXT4_I(inode);
inode->i_state &= ~(I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED);
inode->i_state &= ~I_DIRTY_TIME;
spin_unlock(&inode->i_lock);
spin_lock(&ei->i_raw_lock);

28
fs/fs-writeback.c
View File

@ -1238,7 +1238,7 @@ static bool inode_dirtied_after(struct inode *inode, unsigned long t)
*/
static int move_expired_inodes(struct list_head *delaying_queue,
struct list_head *dispatch_queue,
int flags, unsigned long dirtied_before)
unsigned long dirtied_before)
{
LIST_HEAD(tmp);
struct list_head *pos, *node;
@ -1254,8 +1254,6 @@ static int move_expired_inodes(struct list_head *delaying_queue,
list_move(&inode->i_io_list, &tmp);
moved++;
spin_lock(&inode->i_lock);
if (flags & EXPIRE_DIRTY_ATIME)
inode->i_state |= I_DIRTY_TIME_EXPIRED;
inode->i_state |= I_SYNC_QUEUED;
spin_unlock(&inode->i_lock);
if (sb_is_blkdev_sb(inode->i_sb))
@ -1303,11 +1301,11 @@ static void queue_io(struct bdi_writeback *wb, struct wb_writeback_work *work,
assert_spin_locked(&wb->list_lock);
list_splice_init(&wb->b_more_io, &wb->b_io);
moved = move_expired_inodes(&wb->b_dirty, &wb->b_io, 0, dirtied_before);
moved = move_expired_inodes(&wb->b_dirty, &wb->b_io, dirtied_before);
if (!work->for_sync)
time_expire_jif = jiffies - dirtytime_expire_interval * HZ;
moved += move_expired_inodes(&wb->b_dirty_time, &wb->b_io,
EXPIRE_DIRTY_ATIME, time_expire_jif);
time_expire_jif);
if (moved)
wb_io_lists_populated(wb);
trace_writeback_queue_io(wb, work, dirtied_before, moved);
@ -1483,18 +1481,14 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
spin_lock(&inode->i_lock);
dirty = inode->i_state & I_DIRTY;
if (inode->i_state & I_DIRTY_TIME) {
if ((dirty & I_DIRTY_INODE) ||
wbc->sync_mode == WB_SYNC_ALL ||
unlikely(inode->i_state & I_DIRTY_TIME_EXPIRED) ||
unlikely(time_after(jiffies,
(inode->dirtied_time_when +
dirtytime_expire_interval * HZ)))) {
dirty |= I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED;
trace_writeback_lazytime(inode);
}
} else
inode->i_state &= ~I_DIRTY_TIME_EXPIRED;
if ((inode->i_state & I_DIRTY_TIME) &&
((dirty & I_DIRTY_INODE) ||
wbc->sync_mode == WB_SYNC_ALL || wbc->for_sync ||
time_after(jiffies, inode->dirtied_time_when +
dirtytime_expire_interval * HZ))) {
dirty |= I_DIRTY_TIME;
trace_writeback_lazytime(inode);
}
inode->i_state &= ~dirty;
/*

4
fs/xfs/libxfs/xfs_trans_inode.c
View File

@ -96,9 +96,9 @@ xfs_trans_log_inode(
* to log the timestamps, or will clear already cleared fields in the
* worst case.
*/
if (inode->i_state & (I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED)) {
if (inode->i_state & I_DIRTY_TIME) {
spin_lock(&inode->i_lock);
inode->i_state &= ~(I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED);
inode->i_state &= ~I_DIRTY_TIME;
spin_unlock(&inode->i_lock);
}

1
include/linux/fs.h
View File

@ -2178,7 +2178,6 @@ static inline void kiocb_clone(struct kiocb *kiocb, struct kiocb *kiocb_src,
#define I_DIO_WAKEUP (1 << __I_DIO_WAKEUP)
#define I_LINKABLE (1 << 10)
#define I_DIRTY_TIME (1 << 11)
#define I_DIRTY_TIME_EXPIRED (1 << 12)
#define I_WB_SWITCH (1 << 13)
#define I_OVL_INUSE (1 << 14)
#define I_CREATING (1 << 15)

1
include/trace/events/writeback.h
View File

@ -20,7 +20,6 @@
{I_CLEAR, "I_CLEAR"}, \
{I_SYNC, "I_SYNC"}, \
{I_DIRTY_TIME, "I_DIRTY_TIME"}, \
{I_DIRTY_TIME_EXPIRED, "I_DIRTY_TIME_EXPIRED"}, \
{I_REFERENCED, "I_REFERENCED"} \
)