[PATCH v6 02/11] VFS hot tracking: Track IO and record heat information

From: Zhi Yong Wu This patch adds read/write code paths: include read_pages(), do_writepages(), do_generic_file_read() and __blockdev_direct_IO() to record heat information. When real disk i/o for an inode is done, its own hot_inode_item will be created or updated in the RB tree for the

[PATCH v6 02/11] VFS hot tracking: Track IO and record heat information

From: Zhi Yong Wu wu...@linux.vnet.ibm.com This patch adds read/write code paths: include read_pages(), do_writepages(), do_generic_file_read() and __blockdev_direct_IO() to record heat information. When real disk i/o for an inode is done, its own hot_inode_item will be created or updated in the