diff options
Diffstat (limited to 'fs/f2fs/data.c')
| -rw-r--r-- | fs/f2fs/data.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index e46b5c5..0879d2a 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -508,8 +508,8 @@ repeat: * Caller ensures that this data page is never allocated. * A new zero-filled data page is allocated in the page cache. * - * Also, caller should grab and release a mutex by calling mutex_lock_op() and - * mutex_unlock_op(). + * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and + * f2fs_unlock_op(). * Note that, npage is set only by make_empty_dir. */ struct page *get_new_data_page(struct inode *inode, @@ -595,10 +595,12 @@ static int __allocate_data_block(struct dnode_of_data *dn) } /* - * This function should be used by the data read flow only where it - * does not check the "create" flag that indicates block allocation. - * The reason for this special functionality is to exploit VFS readahead - * mechanism. + * get_data_block() now supported readahead/bmap/rw direct_IO with mapped bh. + * If original data blocks are allocated, then give them to blockdev. + * Otherwise, + * a. preallocate requested block addresses + * b. do not use extent cache for better performance + * c. give the block addresses to blockdev */ static int get_data_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create) |
