Alan Cox: Semi up to date JOBS list [for 2.4 kernel]

Date: Tue, 13 Jun 2000 20:08:25 +0100
From: Alan Cox alan@lxorguk.ukuu.org.uk
To: linux-kernel@vger.rutgers.edu
Subject: Semi up to date JOBS list

Should Be Fixed (Confirmation Wanted)
-------------------------------------
IDE fails on some VIA boards (eg the i-opener)
Floppy driver broken by VFS changes. Other drivers may be too
        (Stuff gets called after _close now - unload race possibly too)
Fbcon races
Fix all remaining PCI code to use new resources and enable_Device (mostly done)

Capable Of Corrupting Your FS
-----------------------------
E820 memory setup causes crashes/corruption on some laptops
Use PCI DMA by default in IDE is unsafe (must not do so on via VPx x<3)

Security
--------
Fix module remove race bug              (mostly done - Al Viro)
exec loader permissions
access_process_mm oops/lockup if task->mm changes (Manfred) [user can cause deliberately]

Boot Time Failures
------------------
AHA29xx driver appears to stomp other cards (may be BIOS)
AHA27xx is broken (maybe 28xx too)
Use PCI DMA 'lost interrupt' problem with some hw [which ?]
        (NEC Versa LX with PIIX tuning)
HT6560/UMC8672 ide sets up stuff too early (before region stuff can be done)
Crashes on boot on some Compaqs ? (may be fixed)
ACPI hangs on boot for some systems
Boot hangs on a range of Dell docking stations (Latitude)

In Progress
-----------
Dcache threading         (Al Viro)
Merge the network fixes  (DaveM)
Finish I2O merge         (Intel/Alan)
Exploitable leak in file locking (Willy)
Restore O_SYNC functionality    (Stephen) - core code and ext2 done

Obvious Projects For People (well if you have the hardware..)
---------------------------
pci_socket crash on unload
DEFXX driver appears broken
NCR5380 isnt smp safe
DMFE is not SMP safe
Make syncppp use new ppp code
Fix SPX socket code
Merge the 2.2 ServeRAID driver into 2.4
Merge the current Compaq RAID driver into 2.4

Fix Exists But Isnt Merged
--------------------------
Update SGI VisWS to new-style IRQ handling (Ingo)
64bit lockf support
Support MP table above 1Gig (Ingo)
Dont panic on boot when meeting HP boxes with wacked APIC table numbering (AC)
Scheduler bugs in RT    (Dimitris)
HFS is still broken
AIC7xxx doesnt work non PCI ? (Doug says OK, new version due anyway)
Fix hpfs_unlink (Al Viro)
Loopback fs hangs
Fix boards with different TSC per CPU and kill TSC use on them
Floppy last block cache flush error
TB Multisound driver hasnt been updated for new isa I/O totally.

To Do
-----
mount crashes on Alpha platforms
Tulip hang on rmmod/crashes sometimes
Devfs races, Sockfs (removing NULL ->i_sb stuf) (Al Viro)
Debian report that the gcc 2.95 possibly miscompiles fault.c or mm/remap.c
        (Perl script available from Arjan)
Fix further NFS races  (Al Viro)
Test other file systems on write
Audit all char and block drivers to ensure they are safe with the 2.3
        locking - a lot of them are not especially on the open() path.
Stick lock_kernel() calls around driver with issues to hard to fix nicely
        for 2.4 itself
PCMCIA/Cardbus hangs, IRQ problems, Keyboard/mouse problem (may be fixed ?)
Fix mount failures due to copy_* user mishandling
Fix default mount behaviour to disallow repeat mounting

To Do But Non Showstopper
-------------------------
Finish 64bit vfs merges (lockf64 and friends missing)
Go through as 2.4pre kicks in and figure what we should mark obsolete for
        the final 2.4
Union mount (Al Viro)
Per Process rtsigio limit
iget abuse in knfsd
Some people report 2.3.x serial problems
USB hangs on APM suspend on some machines
PCMCIA crashes on unloading pci_socket
ISAPnP IRQ handling failing on SB1000 + resource handling bug
DVD-RAM is apparently not working for write currently (Rogier Wolff)
Parallel ports should set SA_SHIRQ if PCI (eg in Plip)
Devfs compiled in but not mounted causes crap for ->mnt_devname of root (Al Viro)

Compatibility Errors
--------------------
Xterm broke in 2.3.99pre6 (FIONREAD/select loop)

Probably Post 2.4
-----------------
per super block write_super needs an async flag
addres_space needs a VM pressure/flush callback  (Ingo)
per file_op rw_kiovec

Drivers In 2.2 not 2.4
----------------------

To Check
--------
Check O_APPEND atomicity bug fixing is complete
Protection on isize  (sct) [Al Viro mostly done]
Mikulas claims we need to fix the getblk/mark_buffer_uptodate thing for
        2.3.x as well
Network block device seems broken by block device changes
VFS?VM - mmap/write deadlock (demo code seems to show lock is there)
rw sempahores on page faults (mmap_sem)
kiobuf seperate lock functions/bounce/page_address fixes
Fix routing by fwmark
Some FB drivers check the A000 area and find it busy then bomb out
rw semaphores on inodes to fix read/truncate races ? [Probably fixed]
Not all device drivers are safe now the write inode lock isnt taken on write
File locking needs checking for races
Multiwrite IDE breaks on a disk error [minor issue at best]
ACPI/APM suspend issue - IDE related stuff ?
NFS bugs are fixed
Chase reports of SMB not working
Locking on getcwd
IRDA calls get random bytes before random is set up
Some AWE cards are not being found by ISAPnP ??
SHM segments not always being detached and destroyed right ?
RAM disk contents vanishing on cramfs (block change) and bforget cases

Fixed
-----
Incredibly slow loopback tcp bug (believed fixed about 2.3.48)
COMX series WAN now merged
VM needs rebalancing or we have a bad leak
SHM works chroot
SHM back compatibility
Intel i960 problems with I2O
Symbol clashes and other mess from _three_ copies of zlib!
PCI buffer overruns
Shared memory changes change the API breaking applications (eg gimp)
Finish softnet driver port over and cleanups
via rhine oopses under load ?
SCSI generic driver crashes controllers (need to pass PCI_DIR_UNKNOWN..)
UMSDOS fixups resync (not quite done)
Make NTFS sort of work
Any user can crash FAT fs code with ftruncate
AFFS fixups
Directory race fix for UFS
Security holes in execve()
Lan Media WAN update for 2.3
Get the Emu10K merged
Paride seems to need fixes for the block changes yet
Kernel corrupts fs and gs in some situations (Ulrich has demo code)
1.07 AMI MegaRAID
Merge 2.2.15 changes     (Alan)
Get RAID 0.90 in         (Ingo)
S/390 Merge
NFS DoS fix (security)
Merge the RIO driver
Fix Space.c duplicate string/write to constants
Elevator and block handling queue change errors are all sorted
Make sure all drivers return 1 from their __setup functions (Done ?)
Enhanced disk statistics
Complete vfsmount merge  (Al Viro)
Merge removed-buf-open directory stuff into VFS (Al Viro)
Problems with ip autoconfig according to Zaitcev
NFS causes dup kmem_create on reload (Trond)
vmalloc(GFP_DMA) is needed for DMA drivers (Ingo)
TLB flush should use highest priority (Ingo)
SMP affinity code creates multiple dirs with the same name (Ingo)
Set SMP affinity mask to actual cpu online mask (needed for some boards) (Ingo)
heavy swapping corrupts ptes (believed so)
pci_set_master forces a 64 latency on low latency setting devices.Some
        boards require all cards have latency <= 32
msync fails on NFS (probably fixed anyway)
Find out what has ruined disk I/O throughput. (mostly)
PIII FXSAVE/FXRESTORE support
The netdev name changing stuff broke GRE
put_user is broken for i386 machines (security) - sem stuff may be wrong too
BusLogic crashes when you cat /proc/scsi/BusLogic/0 (Robert de Vries)
Finish sorting out VM balancing (Rik Van Riel, Juan Quintela et al)
Fix eth= command line
8139 + bridging fails
RtSig limit handling bug
Signals leak kernel memory (security) [FIX in ac tree]
TTY and N_HDLC layer called poll_wait twice per fd and corrupt memory
ATM layer calls poll_wait twice per fd and corrupts memory
Random calls poll_wait twice per fd and corrupts memory
PCI sound calls poll_wait twice per fd and corrupts memory
sbus audio calls poll_wait twice per fd and corrupts memory
IBM MCA driver breaks on Device_Inquiry at boot
SHM code corrupts memory        (Russell)
Linux sends a 1K buffer with SCSI inquiries. The ANSI-SCSI limit is 255.
Linux uses TEST_UNIT_READY to chck for device presence on a PUN/LUN. The
        INQUIRY is the only valid test allowed by the spec.
truncate_inode_pages does unsafe page cache operations
Fix the ptrace code to be back compatible and add a new PTRACE call set for
        getting the PIII extra registers
EPIC100 fixes
Tlan and Epic100 crash under load