[Bug 2143181] Re: Resolute real-time patchset: 7.0-rc1-rt1

This bug was fixed in the package linux-realtime - 7.0.0-10.10.3

---------------
linux-realtime (7.0.0-10.10.3) resolute; urgency=medium

* resolute/linux-realtime: 7.0.0-10.10.3 -proposed tracker (LP:
#2144798)

* Packaging resync (LP: #1786013)
- [Packaging] realtime: remove stale debian/dkms-versions

* Miscellaneous Ubuntu changes
- [Config] realtime: updateconfigs

[ Ubuntu: 7.0.0-10.10 ]

* resolute/linux: 7.0.0-10.10 -proposed tracker (LP: #2144865)
* Miscellaneous upstream changes
- Revert "powerpc: fix KUAP warning in VMX usercopy path"

[ Ubuntu: 7.0.0-9.9 ]

* resolute/linux: 7.0.0-9.9 -proposed tracker (LP: #2144735)
* Please make dracut the default initrd generator (LP: #2142775)
- [Packaging] recommends dracut instead of initramfs-tools
* Miscellaneous Ubuntu changes
- SAUCE: Change RISC-V target to RVA23 (riscv64a23-unknown-linux-gnu)

[ Ubuntu: 7.0.0-8.8 ]

* resolute/linux: 7.0.0-8.8 -proposed tracker (LP: #2144652)
* UBUNTU: SAUCE: igc: Increase Thunderbolt MAC passthrough delay to 1000ms
(LP: #2143197)
- SAUCE: igc: Increase Thunderbolt MAC passthrough delay to 1000ms
* [usrmerge] evaluate kernel owned packages for DEP17 compliance
(LP: #2139276)
- [Packaging] Install modules in /usr/lib/modules
* Miscellaneous Ubuntu changes
- [Config] hardening: enable LIST_HARDENED
- [Config] hardening: disable LDISC_AUTOLOAD
- [Config] hardening: disable LEGACY_PTYS
- [Config] updateconfigs following v7.0-rc4 rebase

-- Kevin Becker <kevin.becker@canonical.com> Tue, 24 Mar 2026 10:10:59
-0400

** Changed in: linux-realtime (Ubuntu Resolute)
Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/2143181

Title:
Resolute real-time patchset: 7.0-rc1-rt1

Status in ubuntu-realtime:
In Progress
Status in linux package in Ubuntu:
Fix Released
Status in linux-realtime package in Ubuntu:
Fix Released
Status in linux source package in Resolute:
Fix Released
Status in linux-realtime source package in Resolute:
Fix Released

Bug description:
[Impact]

Starting in resolute, the patches from the PREEMPT_RT patchset will be
applied to generic so they can be inherited by derivative kernels and
flavors that need real-time. This set of patches will be filtered to
only ones that apply where we support real-time, including amd64 and
arm64.

[Fix]

For kernel 7.0, the upstream PREEMPT_RT patchset 7.0-rc1-rt1 has been
released.

https://lore.kernel.org/linux-rt-
users/20260225120502.XKhQxj1F@linutronix.de/T/

These patches will be applied to resolute:linux (but with
CONFIG_PREEMPT_RT disabled there) and inherited by other kernels.
These patches include the following:

UBUNTU: Real-time patchset 7.0-rc1-rt1
UBUNTU: SAUCE: sysfs: Add /sys/kernel/realtime entry
UBUNTU: SAUCE: Revert "drm/i915: Depend on !PREEMPT_RT."
UBUNTU: SAUCE: drm/i915: Consider RCU read section as atomic.
UBUNTU: SAUCE: drm/i915/guc: Consider also RCU depth in busy loop.
UBUNTU: SAUCE: drm/i915: Drop the irqs_disabled() check
UBUNTU: SAUCE: drm/i915/gt: Use spin_lock_irq() instead of local_irq_disable() + spin_lock()
UBUNTU: SAUCE: drm/i915: Disable tracing points on PREEMPT_RT
UBUNTU: SAUCE: drm/i915: Don't disable interrupts on PREEMPT_RT during atomic updates
UBUNTU: SAUCE: drm/i915: Use preempt_disable/enable_rt() where recommended
UBUNTU: SAUCE: Reapply "serial: 8250: Revert "drop lockdep annotation from serial8250_clear_IER()""
UBUNTU: SAUCE: Reapply "serial: 8250: Switch to nbcon console"

[Test Case]

Compile and boot test

[Where things could go wrong]

These patches primarily apply to the 8250 serial driver and Intel i915
drm driver, so they may cause minor performance differences in these
drivers even when PREEMPT_RT is disabled.

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