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

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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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6
fs/fs-writeback.c
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@@ -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;
/*