Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 40 insertions, 0 deletions

diff --git a/fs/jffs2/TODO b/fs/jffs2/TODO
new file mode 100644
index 000000000000..2bff82fd221f
--- /dev/null
+++ b/fs/jffs2/TODO
@@ -0,0 +1,40 @@
+$Id: TODO,v 1.10 2002/09/09 16:31:21 dwmw2 Exp $
+
+ - 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, changable with chattr, so you can
+        decide which inodes should be in-core immediately after mount.
+ - test, test, test
+
+ - NAND flash support:
+        - flush_wbuf using GC to fill it, don't just pad.
+        - Deal with write errors. Data don't get lost - we just have to write 
+          the affected node(s) out again somewhere else.
+        - make fsync flush only if actually required
+        - make sys_sync() work.
+        - reboot notifier
+        - timed flush of old wbuf
+        - fix magical second arg of jffs2_flush_wbuf(). Split into two or more functions instead.
+
+
+ - Optimisations:
+   - Stop GC from decompressing and immediately recompressing nodes which could
+     just be copied intact. (We now keep track of REF_PRISTINE flag. Easy now.)
+   - Furthermore, in the case where it could be copied intact we don't even need
+     to call iget() for it -- if we use (raw_node_raw->flash_offset & 2) as a flag
+     to show a node can be copied intact and it's _not_ in icache, we could just do
+     it, fix up the next_in_ino list and move on. We would need a way to find out
+     _whether_ it's in icache though -- if it's in icache we also need to do the 
+     fragment lists, etc. P'raps a flag or pointer in the jffs2_inode_cache could
+     help. (We have half of this now.)
+   - 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 totlen from jffs2_raw_node_ref? Need to have totlen passed into
+        jffs2_mark_node_obsolete(). Can all callers work it out?
+   - Remove size from jffs2_raw_node_frag.