| |
| - support asynchronous operation -- add a per-fs 'reserved_space' count, |
| let each outstanding write reserve the _maximum_ amount of physical |
| space it could take. Let GC flush the outstanding writes because the |
| reservations will necessarily be pessimistic. With this we could even |
| do shared writable mmap, if we can have a fs hook for do_wp_page() to |
| make the reservation. |
| - disable compression in commit_write()? |
| - fine-tune the allocation / GC thresholds |
| - chattr support - turning on/off and tuning compression per-inode |
| - checkpointing (do we need this? scan is quite fast) |
| - make the scan code populate real inodes so read_inode just after |
| mount doesn't have to read the flash twice for large files. |
| Make this a per-inode option, changeable with chattr, so you can |
| decide which inodes should be in-core immediately after mount. |
| - test, test, test |
| |
| - NAND flash support: |
| - almost done :) |
| - use bad block check instead of the hardwired byte check |
| |
| - Optimisations: |
| - Split writes so they go to two separate blocks rather than just c->nextblock. |
| By writing _new_ nodes to one block, and garbage-collected REF_PRISTINE |
| nodes to a different one, we can separate clean nodes from those which |
| are likely to become dirty, and end up with blocks which are each far |
| closer to 100% or 0% clean, hence speeding up later GC progress dramatically. |
| - Stop keeping name in-core with struct jffs2_full_dirent. If we keep the hash in |
| the full dirent, we only need to go to the flash in lookup() when we think we've |
| got a match, and in readdir(). |
| - Doubly-linked next_in_ino list to allow us to free obsoleted raw_node_refs immediately? |
| - Remove size from jffs2_raw_node_frag. |
| |
| dedekind: |
| 1. __jffs2_flush_wbuf() has a strange 'pad' parameter. Eliminate. |
| 2. get_sb()->build_fs()->scan() path... Why get_sb() removes scan()'s crap in |
| case of failure? scan() does not clean everything. Fix. |
