diff options
Diffstat (limited to 'kernel/fs/jffs2/TODO')
| -rw-r--r-- | kernel/fs/jffs2/TODO | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/kernel/fs/jffs2/TODO b/kernel/fs/jffs2/TODO new file mode 100644 index 000000000..ca28964ab --- /dev/null +++ b/kernel/fs/jffs2/TODO @@ -0,0 +1,37 @@ + + - 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. |