[Xen-devel] [PATCH v4 00/13] x86: IRQ management adjustments

[Jan Beulich <JBeulich@xxxxxxxx>]

First and foremost this series is trying to deal with CPU offlining
issues, which have become more prominent with the recently
added SMT enable/disable operation in xen-hptool. Later patches
in the series then carry out more or less unrelated changes
(hopefully improvements) noticed while looking at various pieces
of involved code.

01: deal with move-in-progress state in fixup_irqs()
02: deal with move cleanup count state in fixup_irqs()
03: desc->affinity should strictly represent the requested value
04: consolidate use of ->arch.cpu_mask
05: fix locking around vector management
06: x86/IOMMU: don't restrict IRQ affinities to online CPUs
07: target online CPUs when binding guest IRQ
08: correct/tighten vector check in _clear_irq_vector()
09: make fixup_irqs() skip unconnected internally used interrupts
10: drop redundant cpumask_empty() from move_masked_irq()
11: tighten vector checks
12: eliminate some on-stack cpumask_t instances
13: move {,_}clear_irq_vector()

In principle patches 1-7 and maybe 9 are backporting candidates.
Their intrusive nature makes wanting to do so questionable, though.

For v4 specific information please see the individual patches.

Full set of patches attached here due to still unresolved email
issues over here.

Jan

Attachment: x86-fixup-IRQs-move-in-progress.patch
Description: x86-fixup-IRQs-move-in-progress.patch

Attachment: x86-fixup-IRQs-move-cleanup.patch
Description: x86-fixup-IRQs-move-cleanup.patch

Attachment: x86-IRQs-stable-affinity.patch
Description: x86-IRQs-stable-affinity.patch

Attachment: x86-IRQs-cpu_mask-offline.patch
Description: x86-IRQs-cpu_mask-offline.patch

Attachment: x86-IRQs-locking.patch
Description: x86-IRQs-locking.patch

Attachment: x86-IOMMU-irq-affinity.patch
Description: x86-IOMMU-irq-affinity.patch

Attachment: x86-IRQs-guest-bind-affinity.patch
Description: x86-IRQs-guest-bind-affinity.patch

Attachment: x86-IRQs-clear-vector-check.patch
Description: x86-IRQs-clear-vector-check.patch

Attachment: x86-IRQs-no-type.patch
Description: x86-IRQs-no-type.patch

Attachment: x86-move_masked_irq-simplify.patch
Description: x86-move_masked_irq-simplify.patch

Attachment: x86-IRQs-use-valid_irq_vector.patch
Description: x86-IRQs-use-valid_irq_vector.patch

Attachment: x86-IRQs-use-scratch_cpumask.patch
Description: x86-IRQs-use-scratch_cpumask.patch

Attachment: x86-IRQs-clear_irq_vector-move.patch
Description: x86-IRQs-clear_irq_vector-move.patch

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