1*4882a593Smuzhiyun 2*4882a593Smuzhiyun - support asynchronous operation -- add a per-fs 'reserved_space' count, 3*4882a593Smuzhiyun let each outstanding write reserve the _maximum_ amount of physical 4*4882a593Smuzhiyun space it could take. Let GC flush the outstanding writes because the 5*4882a593Smuzhiyun reservations will necessarily be pessimistic. With this we could even 6*4882a593Smuzhiyun do shared writable mmap, if we can have a fs hook for do_wp_page() to 7*4882a593Smuzhiyun make the reservation. 8*4882a593Smuzhiyun - disable compression in commit_write()? 9*4882a593Smuzhiyun - fine-tune the allocation / GC thresholds 10*4882a593Smuzhiyun - chattr support - turning on/off and tuning compression per-inode 11*4882a593Smuzhiyun - checkpointing (do we need this? scan is quite fast) 12*4882a593Smuzhiyun - make the scan code populate real inodes so read_inode just after 13*4882a593Smuzhiyun mount doesn't have to read the flash twice for large files. 14*4882a593Smuzhiyun Make this a per-inode option, changeable with chattr, so you can 15*4882a593Smuzhiyun decide which inodes should be in-core immediately after mount. 16*4882a593Smuzhiyun - test, test, test 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun - NAND flash support: 19*4882a593Smuzhiyun - almost done :) 20*4882a593Smuzhiyun - use bad block check instead of the hardwired byte check 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun - Optimisations: 23*4882a593Smuzhiyun - Split writes so they go to two separate blocks rather than just c->nextblock. 24*4882a593Smuzhiyun By writing _new_ nodes to one block, and garbage-collected REF_PRISTINE 25*4882a593Smuzhiyun nodes to a different one, we can separate clean nodes from those which 26*4882a593Smuzhiyun are likely to become dirty, and end up with blocks which are each far 27*4882a593Smuzhiyun closer to 100% or 0% clean, hence speeding up later GC progress dramatically. 28*4882a593Smuzhiyun - Stop keeping name in-core with struct jffs2_full_dirent. If we keep the hash in 29*4882a593Smuzhiyun the full dirent, we only need to go to the flash in lookup() when we think we've 30*4882a593Smuzhiyun got a match, and in readdir(). 31*4882a593Smuzhiyun - Doubly-linked next_in_ino list to allow us to free obsoleted raw_node_refs immediately? 32*4882a593Smuzhiyun - Remove size from jffs2_raw_node_frag. 33*4882a593Smuzhiyun 34*4882a593Smuzhiyundedekind: 35*4882a593Smuzhiyun1. __jffs2_flush_wbuf() has a strange 'pad' parameter. Eliminate. 36*4882a593Smuzhiyun2. get_sb()->build_fs()->scan() path... Why get_sb() removes scan()'s crap in 37*4882a593Smuzhiyun case of failure? scan() does not clean everything. Fix. 38