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ext4: dynamically allocate the jbd2_inode in ext4_inode_info as necessary

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Replace the jbd2_inode structure (which is 48 bytes) with a pointer
and only allocate the jbd2_inode when it is needed --- that is, when
the file system has a journal present and the inode has been opened
for writing.  This allows us to further slim down the ext4_inode_info
structure.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2011-01-10 12:29:43 -05:00
parent 353eb83c14
commit 8aefcd557d
7 changed files with 74 additions and 25 deletions
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2
fs/ext4/ext4_jbd2.h
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@ -253,7 +253,7 @@ static inline int ext4_journal_force_commit(journal_t *journal)
static inline int ext4_jbd2_file_inode(handle_t *handle, struct inode *inode)
{
if (ext4_handle_valid(handle))
return jbd2_journal_file_inode(handle, &EXT4_I(inode)->jinode);
return jbd2_journal_file_inode(handle, EXT4_I(inode)->jinode);
return 0;
}