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| author | Jan Kara <jack@suse.cz> | 2017-06-22 23:49:46 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2017-06-22 23:49:46 -0400 |
| commit | 3abb1a0fc2871f2db52199e1748a1d48a54a3427 (patch) | |
| tree | 3c4d5c8e9120fe92c37f60449553055d8531ca6c | |
| parent | cdb7ee4c632759075866bb8da5fb16b764e66ded (diff) | |
| download | linux-3abb1a0fc2871f2db52199e1748a1d48a54a3427.tar.bz2 | |
ext4: avoid unnecessary stalls in ext4_evict_inode()
These days inode reclaim calls evict_inode() only when it has no pages
in the mapping. In that case it is not necessary to wait for transaction
commit in ext4_evict_inode() as there can be no pages waiting to be
committed. So avoid unnecessary transaction waiting in that case.
We still have to keep the check for the case where ext4_evict_inode()
gets called from other paths (e.g. umount) where inode still can have
some page cache pages.
Reported-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/inode.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index d9733aa955e9..754c2190af31 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -215,7 +215,8 @@ void ext4_evict_inode(struct inode *inode) */ if (inode->i_ino != EXT4_JOURNAL_INO && ext4_should_journal_data(inode) && - (S_ISLNK(inode->i_mode) || S_ISREG(inode->i_mode))) { + (S_ISLNK(inode->i_mode) || S_ISREG(inode->i_mode)) && + inode->i_data.nrpages) { journal_t *journal = EXT4_SB(inode->i_sb)->s_journal; tid_t commit_tid = EXT4_I(inode)->i_datasync_tid; |