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ext4: avoid calling ext4_mark_inode_dirty() under unneeded semaphores

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There is no need to call ext4_mark_inode_dirty while holding xattr_sem
or i_data_sem, so where it's easy to avoid it, move it out from the
critical region.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2017-01-11 22:14:49 -05:00
parent c755e25135
commit b907f2d519
2 changed files with 4 additions and 7 deletions
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9
fs/ext4/inline.c
View File

@ -1042,7 +1042,6 @@ static int ext4_add_dirent_to_inline(handle_t *handle,
dir->i_mtime = dir->i_ctime = current_time(dir);
ext4_update_dx_flag(dir);
dir->i_version++;
ext4_mark_inode_dirty(handle, dir);
return 1;
}
@ -1311,8 +1310,8 @@ int ext4_try_add_inline_entry(handle_t *handle, struct ext4_filename *fname,
ret = ext4_convert_inline_data_nolock(handle, dir, &iloc);
out:
ext4_mark_inode_dirty(handle, dir);
ext4_write_unlock_xattr(dir, &no_expand);
ext4_mark_inode_dirty(handle, dir);
brelse(iloc.bh);
return ret;
}
@ -1708,13 +1707,11 @@ int ext4_delete_inline_entry(handle_t *handle,
if (err)
goto out;
err = ext4_mark_inode_dirty(handle, dir);
if (unlikely(err))
goto out;
ext4_show_inline_dir(dir, iloc.bh, inline_start, inline_size);
out:
ext4_write_unlock_xattr(dir, &no_expand);
if (likely(err == 0))
err = ext4_mark_inode_dirty(handle, dir);
brelse(iloc.bh);
if (err != -ENOENT)
ext4_std_error(dir->i_sb, err);

2
fs/ext4/inode.c
View File

@ -2464,8 +2464,8 @@ update_disksize:
disksize = i_size;
if (disksize > EXT4_I(inode)->i_disksize)
EXT4_I(inode)->i_disksize = disksize;
err2 = ext4_mark_inode_dirty(handle, inode);
up_write(&EXT4_I(inode)->i_data_sem);
err2 = ext4_mark_inode_dirty(handle, inode);
if (err2)
ext4_error(inode->i_sb,
"Failed to mark inode %lu dirty",