18c2ecf20Sopenharmony_ci 28c2ecf20Sopenharmony_ci - support asynchronous operation -- add a per-fs 'reserved_space' count, 38c2ecf20Sopenharmony_ci let each outstanding write reserve the _maximum_ amount of physical 48c2ecf20Sopenharmony_ci space it could take. Let GC flush the outstanding writes because the 58c2ecf20Sopenharmony_ci reservations will necessarily be pessimistic. With this we could even 68c2ecf20Sopenharmony_ci do shared writable mmap, if we can have a fs hook for do_wp_page() to 78c2ecf20Sopenharmony_ci make the reservation. 88c2ecf20Sopenharmony_ci - disable compression in commit_write()? 98c2ecf20Sopenharmony_ci - fine-tune the allocation / GC thresholds 108c2ecf20Sopenharmony_ci - chattr support - turning on/off and tuning compression per-inode 118c2ecf20Sopenharmony_ci - checkpointing (do we need this? scan is quite fast) 128c2ecf20Sopenharmony_ci - make the scan code populate real inodes so read_inode just after 138c2ecf20Sopenharmony_ci mount doesn't have to read the flash twice for large files. 148c2ecf20Sopenharmony_ci Make this a per-inode option, changeable with chattr, so you can 158c2ecf20Sopenharmony_ci decide which inodes should be in-core immediately after mount. 168c2ecf20Sopenharmony_ci - test, test, test 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ci - NAND flash support: 198c2ecf20Sopenharmony_ci - almost done :) 208c2ecf20Sopenharmony_ci - use bad block check instead of the hardwired byte check 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ci - Optimisations: 238c2ecf20Sopenharmony_ci - Split writes so they go to two separate blocks rather than just c->nextblock. 248c2ecf20Sopenharmony_ci By writing _new_ nodes to one block, and garbage-collected REF_PRISTINE 258c2ecf20Sopenharmony_ci nodes to a different one, we can separate clean nodes from those which 268c2ecf20Sopenharmony_ci are likely to become dirty, and end up with blocks which are each far 278c2ecf20Sopenharmony_ci closer to 100% or 0% clean, hence speeding up later GC progress dramatically. 288c2ecf20Sopenharmony_ci - Stop keeping name in-core with struct jffs2_full_dirent. If we keep the hash in 298c2ecf20Sopenharmony_ci the full dirent, we only need to go to the flash in lookup() when we think we've 308c2ecf20Sopenharmony_ci got a match, and in readdir(). 318c2ecf20Sopenharmony_ci - Doubly-linked next_in_ino list to allow us to free obsoleted raw_node_refs immediately? 328c2ecf20Sopenharmony_ci - Remove size from jffs2_raw_node_frag. 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_cidedekind: 358c2ecf20Sopenharmony_ci1. __jffs2_flush_wbuf() has a strange 'pad' parameter. Eliminate. 368c2ecf20Sopenharmony_ci2. get_sb()->build_fs()->scan() path... Why get_sb() removes scan()'s crap in 378c2ecf20Sopenharmony_ci case of failure? scan() does not clean everything. Fix. 38