Linux 2760 Published by

The first release candidate for Linux kernel 6.9 has been announced by Linus Torvalds. The majority of the changes that have been made are to the header files for AMD GPUs. Approximately forty percent of the patch is comprised of AMD GPU definitions that were generated automatically. However, the core updates are significant, including a rewrite of the timer subsystem to improve performance and a new workqueue subsystem for BH workqueue support. Both of these updates enhance the functionality of the system.

Linux kernel 6.9-rc1 released

So two weeks have passed, the merge window is over, and v6.9-rc1 is tagged and pushed out.

This merge window looks to be fairly normal. If you look at the diffs, you'd think that the bulk of all the changes are AMD GPU header files again, and you'd not be entirely wrong. About 40% of the whole 6.9rc1 patch is indeed just the auto-generated AMD GPU definitions. I wish this was unusual, but it's a pattern.

Anyway, while that is a lot of the actual changes by pure line numbers, it's all just basically noise and not meaningful in the big picture.

In contrast, what _is_ meaningful is a couple of very core updates. The timer subsystem had a fairly big rewrite, to have per-cpu timer wheels to improve performance of timers, which can be a big deal particularly for networking. The other fairly notable core update is to the workqueue subsystem, where one notable addition is for BH workqueue support. That's notable mainly because it means we finally have a way away from tasklets. The tasklet interface has basically been deprecated for a long while, but we've never really had any good alternatives (with threaded interrupt handlers being one suggested use-case, but not realistic in many cases).

The core updates should be entirely invisible to users, as they don't involve any semantic changes, just expanded capabilities. Of course, being somewhat big changes, they did cause a few issues, but we've hopefully already caught all the big deals.

Anyway, there's obviously also all the usual updates, and even when you ignore the recurring AMD header drop more than half of actual patch is - as usual - various driver updates all over. And all the other usual suspects: architecture updates, various filesystems (old ntfs core removal might be worth noting), core networking, VM and kernel. And tooling and documentation.

Please commence testing,


Full source:

You can view the summary of the changes at the following URL:


Alex Williamson (1):
VFIO updates

Alexandre Belloni (2):
i3c updates
RTC updates

Amir Goldstein (1):
overlayfs fixes

Andreas Larsson (1):
sparc updates

Andrew Morton (2):
MM updates
non-MM updates

Andy Shevchenko (1):
auxdisplay updates

Ard Biesheuvel (3):
EFI updates
EFI fix
EFI fixes

Arnd Bergmann (6):
SoC device tree updates
ARM SoC driver updates
ARM SoC code updates
ARM defconfig updates
asm-generic updates
more ARM SoC updates

Bartosz Golaszewski (1):
gpio updates

Bjorn Andersson (3):
remoteproc updates
rpmsg updates
hwspinlock updates

Bjorn Helgaas (1):
PCI updates

Boqun Feng (1):
RCU updates

Borislav Petkov (7):
RAS fixlet
x86 cpu update
x86 MTRR update
resource control updates
x86 SEV updates
misc x86 fixes
EDAC updates

Casey Schaufler (1):
smack updates

Catalin Marinas (2):
arm64 updates
arm64 fixes

Chandan Babu (2):
xfs updates
xfs fixes

Christian Brauner (8):
misc vfs updates
ntfs update
iomap updates
pdfd updates
file locking updates
block handle updates
vfs uuid updates
vfs fixes

Christoph Hellwig (2):
dma-mapping updates
dma-mapping fixes

Chuck Lever (1):
nfsd updates

Damien Le Moal (1):
zonefs update

Dan Williams (1):
CXL updates

Dave Airlie (2):
drm updates
drm fixes

Dave Hansen (4):
x86 mm updates
x86 tdx update
x86 RFDS mitigation
x86 APIC fixup

Dave Jiang (1):
libnvdimm updates

David Sterba (3):
btrfs updates
affs update
btrfs fix

David Teigland (1):
dlm updates

Dmitry Torokhov (1):
input updates

Dominik Brodowski (1):
PCMCIA updates

Eric Biggers (2):
fscrypt updates
fsverity update

Eric Van Hensbergen (1):
9p updates

Gao Xiang (1):
erofs updates

Geert Uytterhoeven (1):
m68k updates

Greg KH (5):
USB / Thunderbolt updates
tty / serial driver updates
staging driver updates
char/misc and other driver subsystem updates
driver core updates

Guenter Roeck (1):
hwmon updates

Heiko Carstens (2):
s390 updates
more s390 updates

Helge Deller (2):
parisc architecture updates and fixes
fbdev updates

Herbert Xu (1):
crypto updates

Huacai Chen (1):
LoongArch updates

Ilpo Järvinen (1):
x86 platform driver updates

Ilya Dryomov (1):
ceph updates

Ingo Molnar (10):
locking updates
scheduler updates
x86 asm updates
x86 build updates
x86 cleanups
core x86 updates
x86 boot updates
x86 perf event fixes
timer fix
irq fix

Jaegeuk Kim (1):
f2fs update

Jakub Kicinski (2):
networking updates
networking fixes

James Bottomley (2):
SCSI updates
more SCSI updates

Jan Kara (2):
fsnotify updates
ext2, isofs, udf, and quota updates

Jarkko Sakkinen (1):
tpm updates

Jason Gunthorpe (1):
rdma updates

Jassi Brar (1):
mailbox updates

Jens Axboe (5):
io_uring updates
block updates
block fixes
more io_uring updates
more block updates

Jiri Kosina (1):
HID updates

Joel Granados (1):
sysctl updates

Joerg Roedel (1):
iommu updates

John Paul Adrian Glaubitz (1):
sh updates

Jonathan Corbet (2):
documentation updates
more documentation updates

Juergen Gross (1):
xen updates

Julia Lawall (1):
coccinelle update

Kees Cook (5):
pstore updates
execve updates
hardening updates
seccomp updates
more hardening updates

Kent Overstreet (2):
bcachefs updates
bcachefs fixes

Lee Jones (3):
MFD updates
backlight updates
LED updates

Linus Walleij (1):
pin control updates

Luis Chamberlain (1):
modules updates

Mark Brown (5):
regmap updates
regulator updates
spi updates
regulator fix
spi fixes

Masahiro Yamada (1):
Kbuild updates

Masami Hiramatsu (1):
probes updates

Mauro Carvalho Chehab (1):
media updates

Michael Ellerman (2):
powerpc updates
more powerpc updates

Michael Tsirkin (1):
virtio updates

Mickaël Salaün (1):
landlock updates

Miguel Ojeda (2):
compiler attributes update
Rust updates

Mike Marshall (1):
orangefs updates

Mike Snitzer (4):
device mapper updates
device mapper BH workqueue conversion
device mapper VDO target
device mapper fixes

Miklos Szeredi (1):
fuse updates

Miquel Raynal (1):
MTD updates

Namhyung Kim (1):
perf tools updates

Namjae Jeon (1):
exfat updates

Niklas Cassel (2):
ata updates
ata fix

Palmer Dabbelt (1):
RISC-V updates

Paolo Bonzini (1):
kvm updates

Paul Moore (4):
audit updates
selinux updates
lsm updates
lsm fixes

Petr Mladek (1):
printk updates

Rafael Wysocki (6):
power management updates
ACPI updates
thermal control updates
more thermal control updates
more ACPI updates
more power management updates

Richard Weinberger (1):
UBI and UBIFS updates

Rob Herring (1):
devicetree updates

Russell King (1):
ARM updates

Sebastian Reichel (2):
HSI updates
power supply and reset updates

Shuah Khan (2):
kselftest update
KUnit updates

Stafford Horne (1):
OpenRISC updates

Stephen Boyd (1):
clk updates

Steve French (3):
smb client updates
smb server updates
smb client fixes

Steven Rostedt (4):
tracing updates
tracing updates
ktest updates
trace tool updates

Takashi Iwai (3):
sound updates
sound fixes
more sound fixes

Takashi Sakamoto (1):
firewire updates

Ted Ts'o (1):
ext4 updates

Tejun Heo (3):
workqueue updates
workqueue BH conversions
cgroup updates

Thomas Bogendoerfer (1):
MIPS updates

Thomas Gleixner (14):
irq updates
MSI updates
cpu core updates
clocksource updates
timer updates
x86 APIC updates
x86 FRED support
x86 entry update
core entry fix
irq fixes
more clocksource updates
timer fixes
scheduler doc clarification
x86 fixes

Trond Myklebust (1):
NFS client updates

Tzung-Bi Shih (1):
chrome platform firmware updates

Ulf Hansson (2):
MMC updates
pmdomain updates

Uwe Kleine-König (2):
pwm updates
siox updates

Vinod Koul (3):
soundwire updates
dmaengine updates
phy updates

Vlastimil Babka (1):
slab updates

Wei Liu (1):
hyperv updates

Wim Van Sebroeck (1):
watchdog updates

Wolfram Sang (2):
i2c updates
more i2c updates

Yury Norov (1):
bitmap updates