[v2,00/12] x86: IRQ management adjustments

Message

Jan Beulich May 8, 2019, 12:59 p.m. UTC

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: avoid UB (or worse) in trace_irq_mask()
04: improve dump_irqs()
05: desc->affinity should strictly represent the requested value
06: consolidate use of ->arch.cpu_mask
07: fix locking around vector management
08: correct/tighten vector check in _clear_irq_vector()
09: make fixup_irqs() skip unconnected internally used interrupts
10: reduce unused space in struct arch_irq_desc
11: drop redundant cpumask_empty() from move_masked_irq()
12: simplify and rename pirq_acktype()

In principle patches 1-3, 5-7, and maybe 9 are backporting candidates.
Their intrusive nature makes wanting to do so questionable, though.

I'm omitting the final v1 "x86/IO-APIC: drop an unused variable from
setup_IO_APIC_irqs()" here, as it was acked already and is entirely
independent of this series. For other v2 specific information please
see the individual patches.

Jan