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fs: don't call ->dirty_inode for lazytime timestamp updates 

There is no need to call ->dirty_inode for lazytime timestamp updates
(i.e. for __mark_inode_dirty(I_DIRTY_TIME)), since by the definition of
lazytime, filesystems must ignore these updates.  Filesystems only need
to care about the updated timestamps when they expire.

Therefore, only call ->dirty_inode when I_DIRTY_INODE is set.

Based on a patch from Christoph Hellwig:
https://lore.kernel.org/r/20200325122825.1086872-4-hch@lst.de

Link: https://lore.kernel.org/r/20210112190253.64307-6-ebiggers@kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Eric Biggers 2021-01-12 11:02:47 -08:00 committed by Jan Kara
parent ff4136e64d
commit e2728c5621
4 changed files with 4 additions and 19 deletions
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12
fs/ext4/inode.c
View File

@ -5933,26 +5933,16 @@ out:
* If the inode is marked synchronous, we don't honour that here - doing
* so would cause a commit on atime updates, which we don't bother doing.
* We handle synchronous inodes at the highest possible level.
*
* If only the I_DIRTY_TIME flag is set, we can skip everything. If
* I_DIRTY_TIME and I_DIRTY_SYNC is set, the only inode fields we need
* to copy into the on-disk inode structure are the timestamp files.
*/
void ext4_dirty_inode(struct inode *inode, int flags)
{
handle_t *handle;
if (flags == I_DIRTY_TIME)
return;
handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
if (IS_ERR(handle))
goto out;
return;
ext4_mark_inode_dirty(handle, inode);
ext4_journal_stop(handle);
out:
return;
}
int ext4_change_inode_journal_flag(struct inode *inode, int val)

3
fs/f2fs/super.c
View File

@ -1196,9 +1196,6 @@ static void f2fs_dirty_inode(struct inode *inode, int flags)
inode->i_ino == F2FS_META_INO(sbi))
return;
if (flags == I_DIRTY_TIME)
return;
if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
clear_inode_flag(inode, FI_AUTO_RECOVER);

6
fs/fs-writeback.c
View File

@ -2255,16 +2255,16 @@ void __mark_inode_dirty(struct inode *inode, int flags)
* Don't do this for I_DIRTY_PAGES - that doesn't actually
* dirty the inode itself
*/
if (flags & (I_DIRTY_INODE | I_DIRTY_TIME)) {
if (flags & I_DIRTY_INODE) {
trace_writeback_dirty_inode_start(inode, flags);
if (sb->s_op->dirty_inode)
sb->s_op->dirty_inode(inode, flags);
trace_writeback_dirty_inode(inode, flags);
}
if (flags & I_DIRTY_INODE)
flags &= ~I_DIRTY_TIME;
}
dirtytime = flags & I_DIRTY_TIME;
/*

2
fs/gfs2/super.c
View File

@ -562,8 +562,6 @@ static void gfs2_dirty_inode(struct inode *inode, int flags)
int need_endtrans = 0;
int ret;
if (!(flags & I_DIRTY_INODE))
return;
if (unlikely(gfs2_withdrawn(sdp)))
return;
if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {