Kernel 6.12 RC (Release Candidate) series

[Doug S]

The kernel 6.12 cycle started a few weeks ago, and is already up to 6.12-rc3.
I do not know what is going on with the Ubuntu Mainline PPA, which seems to have stopped doing anything since about mid September.

doug@s19:~$ uname -a
Linux s19 6.12.0-rc3-stock #1278 SMP PREEMPT_DYNAMIC Wed Oct 16 07:46:47 PDT 2024 x86_64 x86_64 x86_64 GNU/Linux

[mezaway]

I've not seen any updates for 6.12 rc series either. Been wondering what's up with that, and if it has anything to do with the change in kernel availability in future Ubuntu releases..

[corradoventu]

The builders are being moved to a different data center. Mainline builds will show up again once they're up and running.

https://lists.ubuntu.com/archives/ke...er/154532.html

[1fallen]

My last mail inculcated this:

Expect kernel 6.12 to stay in various release candidate versions through October and November, with a likely full release around the first of December.

If you want to compile it: https://www.kernel.org/

[Doug S]

The builders are being moved to a different data center. Mainline builds will show up again once they're up and running.

https://lists.ubuntu.com/archives/ke...er/154532.html

Agh. Thank you.

[Doug S]

My last mail inculcated this:

If you want to compile it: https://www.kernel.org/

I have "how to" notes here. Since Ubuntu mainline PPAs are not currently available, I would just steal the kernel configuration from the most recent Ubuntu mainline PPA (6.11) and use it.

[1fallen]

I have "how to" notes here. Since Ubuntu mainline PPAs are not currently available, I would just steal the kernel configuration from the most recent Ubuntu mainline PPA (6.11) and use it.

Thanks Doug S I Stole that recipe a long time ago, but it is one I still use to this day,

I'm on ZFS so I'll just wait for it to come in, if I break this system it will the last Ubuntu install this machine will ever see.

I'm still waiting for Canonical to find their way back to sanity.....LOL
I like it so far on Arch though>>>uname -r
6.12.0-rc4-1-gcc

[Doug S]

Kernel 6.12-rc5 is available.

doug@s19:~$ uname -a
Linux s19 6.12.0-rc5-stock #1279 SMP PREEMPT_DYNAMIC Sun Oct 27 18:16:45 PDT 2024 x86_64 x86_64 x86_64 GNU/Linux

I was running kernel 6.12-rc3 when I compiled it, and it took almost twice as long as normal to compile, with some unusual warnings:

doug@s19:~/kernel/linux$ time make -s -j13 olddefconfig bindeb-pkg LOCALVERSION=-stock
...
fs/bcachefs/btree_cache.o: warning: objtool: __bch2_btree_node_get() falls through to next function bch2_btree_node_get()
fs/bcachefs/btree_cache.o: warning: objtool: bch2_btree_node_get() falls through to next function bch2_btree_node_get_noiter()
fs/bcachefs/btree_key_cache.o: warning: objtool: bch2_btree_path_traverse_cached() falls through to next function bch2_btree_insert_key_cached()
fs/bcachefs/btree_update.o: warning: objtool: bch2_trans_update_get_key_cache() falls through to next function flush_new_cached_update()
fs/bcachefs/btree_update.o: warning: objtool: flush_new_cached_update() falls through to next function bch2_trans_update_by_path()
...
real    60m21.634s
user    656m57.230s
sys     56m34.672s

EDIT: I did a clean compile using 6.12-rc5, and the time was normal:

real    32m16.444s
user    351m55.224s
sys     29m31.062s

[1fallen]

Doug S sorry but I'm curious of your findings with "bcachefs", I use it on one install so far.

Also has anyone really heard about what they are doing with the RT patch?
https://documentation.ubuntu.com/real-time/en/latest/

[Doug S]

Doug S sorry but I'm curious of your findings with "bcachefs", I use it on one install so far.

I might be mistaken, but I do not recall seeing those compile warnings in previous 6.12 RC compiles. I did miss 6.12-RC4.

Anyway, I looked at the tags for the most recent commits for all of the files involved, from which I suspect "fs/bcachefs/btree_update.c" because it only has the 6.12-RC5 tag on the latest commit:

doug@s19:~/kernel/linux$ git log --oneline fs/bcachefs/btree_update.c
a0d11feefb19 bcachefs: Don't use commit_do() unnecessarily
32ed4a620c54 bcachefs: Btree path tracepoints
.
.
.
doug@s19:~/kernel/linux$ git tag --contains a0d11feefb19
v6.12-rc5

I wasn't planning on doing any more with this, unless you want me to. I was planning on just waiting until the next RC to see if it gets fixed. This is not a kernel area I know at all.