I agree that it is wise to intersect cq_cpumask with online_cpumask in
cq_cpulist_set(), and if cpuset_weight(cq_cpumask & online_cpumask) == 0
-- ignore cq_cpumask and stick with default behavior.
I don't think cpu offlining is problematic here. If CPU is offlined --
the IRQ (and queue) will be
The permission is set to 0 on a purpose -- to prevent runtime changes.
The parameter can be still used on modprobe/insmod or on kernel command
line.
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** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1831573
Title:
Host arch executables are installed in
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1831568
Title:
[realtime app] disable idle load balancing on cpus
Public bug reported:
When cross-compiling linux deb packages host arch binaries gets placed
in target deb making it impossible to build kernel modules on target.
I'm attaching linux-4.9 patches which solves this issue for us.
** Affects: linux (Ubuntu)
Importance: Undecided
Status:
** Patch added:
"0002-builddeb-fix-lib-modules-uname-r-build-scrips-cross-.patch"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1831573/+attachment/5268720/+files/0002-builddeb-fix-lib-modules-uname-r-build-scrips-cross-.patch
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** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1831566
Title:
[realtime app] not possible to redirect drivers/nvme
Public bug reported:
We're running realtime application on Ubuntu 16.04 with linux-image 4.15
and found that from time to time we get jitter caused by idle load
balancing. I'm providing here a patch which solved the issue for us.
The realtime application is bound to isolated CPUs (one thread per
Public bug reported:
We're running realtime application on Ubuntu 16.04 with linux-image 4.15
and found it impossible to get rid of jitter introduced by Intel NVMe
IRQs. I'm providing here a patch which solved the issue for us.
The realtime application is bound to isolated CPUs (one thread per
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