tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1$Id: TODO,v 1.10 2002/09/09 16:31:21 dwmw2 Exp $
2
3 - disable compression in commit_write()?
4 - fine-tune the allocation / GC thresholds
5 - chattr support - turning on/off and tuning compression per-inode
6 - checkpointing (do we need this? scan is quite fast)
7 - make the scan code populate real inodes so read_inode just after
8 mount doesn't have to read the flash twice for large files.
9 Make this a per-inode option, changable with chattr, so you can
10 decide which inodes should be in-core immediately after mount.
11 - test, test, test
12
13 - NAND flash support:
14 - flush_wbuf using GC to fill it, don't just pad.
15 - Deal with write errors. Data don't get lost - we just have to write
16 the affected node(s) out again somewhere else.
17 - make fsync flush only if actually required
18 - make sys_sync() work.
19 - reboot notifier
20 - timed flush of old wbuf
21 - fix magical second arg of jffs2_flush_wbuf(). Split into two or more functions instead.
22
23
24 - Optimisations:
25 - Stop GC from decompressing and immediately recompressing nodes which could
26 just be copied intact. (We now keep track of REF_PRISTINE flag. Easy now.)
27 - Furthermore, in the case where it could be copied intact we don't even need
28 to call iget() for it -- if we use (raw_node_raw->flash_offset & 2) as a flag
29 to show a node can be copied intact and it's _not_ in icache, we could just do
30 it, fix up the next_in_ino list and move on. We would need a way to find out
31 _whether_ it's in icache though -- if it's in icache we also need to do the
32 fragment lists, etc. P'raps a flag or pointer in the jffs2_inode_cache could
33 help. (We have half of this now.)
34 - Stop keeping name in-core with struct jffs2_full_dirent. If we keep the hash in
35 the full dirent, we only need to go to the flash in lookup() when we think we've
36 got a match, and in readdir().
37 - Doubly-linked next_in_ino list to allow us to free obsoleted raw_node_refs immediately?
38 - Remove totlen from jffs2_raw_node_ref? Need to have totlen passed into
39 jffs2_mark_node_obsolete(). Can all callers work it out?
40 - Remove size from jffs2_raw_node_frag.