Public bug reported:
SRU Justification
[Impact]
* Microsoft requested patches to better spread IRQs per cpu
[Fix]
* 3 clean cherry-picks from upstream
* c1f5204efcbc: "cpumask: add cpumask_weight_andnot()"
* dcee228078c3: "cpumask: define cleanup function for cpumasks"
* 91bfe210e196: "net: mana: add a function to spread IRQs per CPUs"
[Test Plan]
* Compile tested
[Regression potential]
* Changes are largely localized to MANA and have been upstream as of
6.9. Possible regressions could result in unexpected workflow in which
performance degradation occurs due to updated IRQ spreading heuristic.
[Other info]
* SF#00413058
** Affects: linux-azure (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-azure (Ubuntu Jammy)
Importance: Undecided
Status: New
** Affects: linux-azure (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux-azure (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux-azure (Ubuntu Noble)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2115309
Title:
net: mana: Assigning IRQ affinity on HT cores - additional patches
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