Commit cf5b15ab authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'obsdolete-todo' 



Wang Qing says:

====================
Clean up obsolete TODO files

It is mentioned in the official documents of the Linux Foundation and WIKI
that you can participate in its development according to the TODO files of
each module.

But the TODO files here has not been updated for 15 years, and the function
development described in the file have been implemented or abandoned.

Its existence will mislead developers seeking to view outdated information.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents cda1893e b9aa074b

arch/mips/sgi-ip27/TODO

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1. Need to figure out why PCI writes to the IOC3 hang, and if it is okay

not to write to the IOC3 ever.

2. Need to figure out RRB allocation in bridge_startup().

3. Need to figure out why address swaizzling is needed in inw/outw for

Qlogic scsi controllers.

4. Need to integrate ip27-klconfig.c:find_lboard and

ip27-init.c:find_lbaord_real. DONE

5. Is it okay to set calias space on all nodes as 0, instead of 8k as

in irix?

6. Investigate why things do not work without the setup_test() call

being invoked on all nodes in ip27-memory.c.

8. Too many do_page_faults invoked - investigate.

9. start_thread must turn off UX64 ... and define tlb_refill_debug.

10. Need a bad pmd table, bad pte table. __bad_pmd_table/__bad_pagetable

does not agree with pgd_bad/pmd_bad.

11. All intrs (ip27_do_irq handlers) are targeted at cpu A on the node.

This might need to change later. Only the timer intr is set up to be

received on both Cpu A and B. (ip27_do_irq()/bridge_startup())

13. Cache flushing (specially the SMP version) has to be investigated.

drivers/scsi/aacraid/TODO

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o	Testing

o	More testing

o	I/O size increase

fs/befs/TODO

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TODO

==========



* Convert comments to the Kernel-Doc format.



* Befs_fs.h has gotten big and messy. No reason not to break it up into 

	smaller peices.



* See if Alexander Viro's option parser made it into the kernel tree. 

	Use that if we can. (include/linux/parser.h)



* See if we really need separate types for on-disk and in-memory 

	representations of the superblock and inode.

fs/jffs2/TODO

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 - 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.

net/ax25/TODO

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Do the ax25_list_lock, ax25_dev_lock, linkfail_lockreally, ax25_frag_lock and

listen_lock have to be bh-safe?



Do the netrom and rose locks have to be bh-safe?



A device might be deleted after lookup in the SIOCADDRT ioctl but before it's

being used.



Routes to a device being taken down might be deleted by ax25_rt_device_down

but added by somebody else before the device has been deleted fully.



The ax25_rt_find_route synopsys is pervert but I somehow had to deal with

the race caused by the static variable in it's previous implementation.



Implement proper socket locking in netrom and rose.



Check socket locking when ax25_rcv is sending to raw sockets.  In particular

ax25_send_to_raw() seems fishy.  Heck - ax25_rcv is fishy.



Handle XID and TEST frames properly.