This page lists the patches and features of the Linux kernel that CELF members are interested in the status of. The patches and features may be the topics of discussion at CELF meetings, and we plan to watch and report the status of these patches.
The Status field in the table below indicates whether this feature is on track for being mainlined. The When was last activity field indicates the kernel version number or date when the last activity was noted for this feature. This could be the last kernel version where bits from this patch were mainlined, or the last date of visible feature development activity outside the main tree.
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Note: This page is not prepared strictly for Linux kernel stuffs. You can include the other open source software items on the Linux for the embedded system use.
Contents
Latest Watchlist
Please add or modify your observations.
Linux Kernel Stuffs
Patch or Feature |
Status |
When was last activity |
Notes |
Now in active development. Patches published for 2.6.23 |
Latest patches were published Oct. 13, 2007 |
Maintainer was found at OLS. New maintainer is Michael Opdenacker. See http://elinux.org/Linux_Tiny |
|
squashfs |
Latest release is 3.2-r2. Not mainlined. Phillip Lougher said he was aiming for Oct 22 mainline attempt. Unfortunately, an accident involving his hand has slowed things down. |
Last mainline attempt was over a year ago. Last release (3.2-r2) was Jan 15, 2007 |
CELF has offered Philip funding to support this work, but not gotten a response. |
AXFS |
? |
? |
? |
LogFS |
Not mainlined yet. In active development with patches submitted to LKML . CELF is contracting with Jorn Engel to do mainline activity. |
? |
- |
LTTng |
core not mainlined. Markers were mainlined in 2.6.23?? |
? |
LTTng instrumentation bits were changed to use markers, in early 2007 |
SystemTap (and Kprobes) for non-i386 arches |
no embedded arch support mainlined yet |
? |
KProbes ports for ARM, MIPS and PPC32 were reported on at ELC 2007, SystemTap for SH was demo'ed at ELC 2007 |
pagemap instrumentation |
currently in -mm, targetted for 2.6.23? |
July 2007 |
Matt Mackall was fixing a lock contention bug (as of July 2007) |
KFT (Kernel Function Trace) |
not mainlined - broken on ARM (with gcc > 4.x), PPC64 has problems (reports parent funcs of inlines). Nicholas McGuire is taking over maintainership from Tim Bird, with funding from CELF |
last published external patches for 2.6.21 |
- |
printk-times (arch support) |
fully mainlined? |
April, 2005 |
Some arches had problems with accessing the clock too early in the kernel bootup sequence, but a new setup routine defers turning on the timestamping until after timekeeping is initialized |
RT-preempt |
some parts mainlined (last part was high res. timers in 2.6.21) |
2.6.21? |
Next target is to integrate threaded interrupts in 2.6.23?? Still not integrated threaded interrupt in 2.6.23 |
App Armour |
not mainlined |
May, 2007 |
Some kernel developers still have objections to path-based security |
not mainlined |
Oct 11, 2007 (4th post) (trying now) |
"TOMOYO Linux has only recently surfaced on the wider mailing lists; its reception has not been entirely friendly. This project's developers have some work to do if they are (1) to get past the same obstacles which have slowed AppArmor, and (2) show that their project is sufficiently different from AppArmor to merit inclusion as yet another security framework." (from Linux Weather Forecast) |
|
powertop |
? |
? |
ACPI version available; reported to be portable to non-Intel architectures, but no attempt known |
PM QoS |
in 2.6.23-mm1 |
Oct '07 |
(see http://lesswatts.org) need Embedded folks to take a look and help define the interface, expand the features and raise issues from the embedded perspective. |
|
Seems to be merged into mainline (see: http://lwn.net/Articles/242483/ ) |
July, 2007 |
Lets pay attention! |
|
Seems to be merged into mainline |
July, 2007 |
Lets pay attention! |
kpagemap (system-wide memory instrumentation |
in -mm?? |
Aug, 2007? |
Matt has a few locking bugs to resolve before it can hit mainline |
[NEW]
Non Linux Kernel OSS stuffs
Patch or Feature |
Status |
When was last activity |
Notes |
|
Developer has added support for all profiles except MPEG-4 and WMV ( http://hg.geexbox.org/libdlna/ ) |
29 Aug, 07 |
Short term goal is to provide DLNA support to Ushare media server, long term goal is to provide generic DLNA reference library |
Snapshot as of October 24, 2007
Patch or Feature |
Status |
When was last activity |
Notes |
Now in active development. Patches published for 2.6.23 |
Latest patches were published Oct. 13, 2007 |
Maintainer was found at OLS. New maintainer is Michael Opdenacker. See http://elinux.org/Linux_Tiny |
|
squashfs |
Latest release is 3.2-r2. Not mainlined. Phillip Lougher said he was aiming for Oct 22 mainline attempt. Unfortunately, an accident involving his hand has slowed things down. |
Last mainline attempt was over a year ago. Last release (3.2-r2) was Jan 15, 2007 |
CELF has offered Philip funding to support this work, but not gotten a response. |
AXFS |
? |
? |
? |
LogFS |
Not mainlined yet. In active development with patches submitted to LKML . CELF is contracting with Jorn Engel to do mainline activity. |
? |
- |
LTTng |
core not mainlined. Markers were mainlined in 2.6.23?? |
? |
LTTng instrumentation bits were changed to use markers, in early 2007 |
SystemTap (and Kprobes) for non-i386 arches |
no embedded arch support mainlined yet |
? |
KProbes ports for ARM, MIPS and PPC32 were reported on at ELC 2007, SystemTap for SH was demo'ed at ELC 2007 |
pagemap instrumentation |
currently in -mm, targetted for 2.6.23? |
July 2007 |
Matt Mackall was fixing a lock contention bug (as of July 2007) |
KFT (Kernel Function Trace) |
not mainlined - broken on ARM (with gcc > 4.x), PPC64 has problems (reports parent funcs of inlines). Nicholas McGuire is taking over maintainership from Tim Bird, with funding from CELF |
last published external patches for 2.6.21 |
- |
printk-times (arch support) |
fully mainlined? |
April, 2005 |
Some arches had problems with accessing the clock too early in the kernel bootup sequence, but a new setup routine defers turning on the timestamping until after timekeeping is initialized |
RT-preempt |
some parts mainlined (last part was high res. timers in 2.6.21) |
2.6.21? |
Next target is to integrate threaded interrupts in 2.6.23?? |
App Armour |
not mainlined |
May, 2007 |
Some kernel developers still have objections to path-based security |
not mainlined |
Oct 11, 2007 (4th post) (trying now) |
"TOMOYO Linux has only recently surfaced on the wider mailing lists; its reception has not been entirely friendly. This project's developers have some work to do if they are (1) to get past the same obstacles which have slowed AppArmor, and (2) show that their project is sufficiently different from AppArmor to merit inclusion as yet another security framework." (from Linux Weather Forecast) |
|
powertop |
? |
? |
ACPI version available; reported to be portable to non-Intel architectures, but no attempt known |
PM QoS |
in 2.6.23-mm1 |
Oct '07 |
(see http://lesswatts.org) need Embedded folks to take a look and help define the interface, expand the features and raise issues from the embedded perspective. |
|
Seems to be merged into mainline (see: http://lwn.net/Articles/242483/ ) |
July, 2007 |
Lets pay attention! |
|
Seems to be merged into mainline |
July, 2007 |
Lets pay attention! |
kpagemap (system-wide memory instrumentation |
in -mm?? |
Aug, 2007? |
Matt has a few locking bugs to resolve before it can hit mainline |
|
Developer has added support for all profiles except MPEG-4 and WMV ( http://hg.geexbox.org/libdlna/ ) |
29 Aug, 07 |
Short term goal is to provide DLNA support to Ushare media server, long term goal is to provide generic DLNA reference library |
Snapshot as of July 23, 2007
Patch or Feature |
Status |
When was last activity |
Notes |
some sub-patches mainlined, 86 outstanding, 63 bit-rotted relative to 2.6.21 |
patches published for 2.6.14 |
Some discussion at OLS 2007 about new maintainer. |
|
squashfs |
not mainlined |
? |
last mainline attempt was over a year ago |
axfs |
? |
? |
? |
LogFS |
Not mainlined yet. In active development with patches submitted to LKML |
? |
Reported to still be not-ready-for-prime-time; could offer significant memory gains for embedded flash-based systems |
LTTng |
core not mainlined (what about markers??) |
? |
LTTng instrumentation bits were changed to use markers, in early 2007 |
SystemTap (and Kprobes) for non-i386 arches |
no embedded arch support mainlined yet |
? |
KProbes ports for ARM, MIPS and PPC32 were reported on at ELC 2007, SystemTap for SH was demo'ed at ELC 2007 |
pagemap instrumentation |
currently in -mm, targetted for 2.6.23? |
July 2007 |
Matt Mackall was fixing a lock contention bug (as of July 2007) |
KFT (Kernel Function Trace) |
not mainlined - broken on ARM (with gcc > 4.x), PPC64 has problems (reports parent funcs of inlines) |
last published external patches for 2.6.21 |
working to transfer maintainership of this from Tim Bird to Nicholas McGuire |
printk-times (arch support) |
fully mainlined? |
April, 2005 |
Some arches had problems with accessing the clock too early in the kernel bootup sequence, but a new setup routine defers turning on the timestamping until after timekeeping is initialized |
RT-preempt |
some parts mainlined (last part was high res. timers in 2.6.21) |
2.6.21? |
Next target is to integrate threaded interrupts in 2.6.23?? |
App Armour |
not mainlined |
May, 2007 |
Some kernel developers still have objections to path-based security |
not mainlined |
Jun 13, 2007 (1st post) |
Some kernel developers still have objections to path-based security |
|
powertop |
? |
? |
ACPI version available; reported to be portable to non-Intel architectures, but no attempt known |
|
Seems to be merged into mainline (see: http://lwn.net/Articles/242483/ ) |
July, 2007 |
Lets pay attention! |
|
Seems to be merged into mainline |
July, 2007 |
Lets pay attention! |
Snapshot as of July 9, 2007
Patch or Feature |
Status |
When was last activity |
Notes |
some sub-patches mainlined, 86 outstanding, 63 bit-rotted relative to 2.6.21 |
patches published for 2.6.14 |
Some discussion at OLS 2007 about new maintainer. |
|
squashfs |
not mainlined |
? |
last mainline attempt was over a year ago |
axfs |
? |
? |
? |
LogFS |
? |
? |
Reported to still be not-ready-for-prime-time; could offer significant memory gains for embedded flash-based systems |
LTTng |
core not mainlined (what about markers??) |
? |
LTTng instrumentation bits were changed to use markers, in early 2007 |
SystemTap (and Kprobes) for non-i386 arches |
no embedded arch support mainlined yet |
? |
KProbes ports for ARM, MIPS and PPC32 were reported on at ELC 2007, SystemTap for SH was demo'ed at ELC 2007 |
pagemap instrumentation |
currently in -mm, targetted for 2.6.23? |
July 2007 |
Matt Mackall was fixing a lock contention bug (as of July 2007) |
KFT (Kernel Function Trace) |
not mainlined - broken on ARM (with gcc > 4.x), PPC64 has problems (reports parent funcs of inlines) |
last published external patches for 2.6.21 |
working to transfer maintainership of this from Tim Bird to Nicholas McGuire |
printk-times (arch support) |
fully mainlined? |
April, 2005 |
Some arches had problems with accessing the clock too early in the kernel bootup sequence, but a new setup routine defers turning on the timestamping until after timekeeping is initialized |
RT-preempt |
some parts mainlined (last part was high res. timers in 2.6.21) |
2.6.21? |
Next target is to integrate threaded interrupts in 2.6.23?? |
App Armour |
not mainlined |
May, 2007 |
Some kernel developers still have objections to path-based security |
not mainlined |
Jun 13, 2007 (1st post) |
Some kernel developers still have objections to path-based security |
|
powertop |
? |
? |
ACPI version available; reported to be portable to non-Intel architectures, but no attempt known |
2 presentations in Japan Jamboree about the experience of posting patches to community. (See JapanTechnicalJamboree15 ).
Ideas
- Should we have a designated watcher for each patch?
- Should we have a column for "how can CELF help with this patch?"