Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq

[patch -rt 0/2] use simple waitqueue for kvm vcpu waitqueue (v3) · Marcelo Tosatti <hidden> · 2015-01-14
[patch -rt 2/2] KVM: lapic: mark LAPIC timer handler as irqsafe · Marcelo Tosatti <hidden> · 2015-01-14
Re: [patch -rt 2/2] KVM: lapic: mark LAPIC timer handler as irqsafe · Rik van Riel <hidden> · 2015-01-14
[patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Marcelo Tosatti <hidden> · 2015-01-14
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Rik van Riel <hidden> · 2015-01-14
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Steven Rostedt <rostedt@goodmis.org> · 2015-01-16
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Steven Rostedt <rostedt@goodmis.org> · 2015-01-16
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Peter Zijlstra <peterz@infradead.org> · 2015-01-17
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Marcelo Tosatti <hidden> · 2015-01-19
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Paul Mackerras <hidden> · 2015-01-20
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Steven Rostedt <rostedt@goodmis.org> · 2015-01-20
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Peter Zijlstra <peterz@infradead.org> · 2015-01-21
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Sebastian Andrzej Siewior <bigeasy@linutronix.de> · 2015-02-17
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Peter Zijlstra <peterz@infradead.org> · 2015-02-18
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Sebastian Andrzej Siewior <bigeasy@linutronix.de> · 2015-02-25
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Peter Zijlstra <peterz@infradead.org> · 2015-08-07
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Peter Zijlstra <peterz@infradead.org> · 2015-08-07
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Christoph Hellwig <hch@infradead.org> · 2015-08-07
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Peter Zijlstra <peterz@infradead.org> · 2015-08-07
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Christoph Hellwig <hch@infradead.org> · 2015-08-09
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Thomas Gleixner <hidden> · 2015-08-17
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Marcelo Tosatti <hidden> · 2015-02-27
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Marcelo Tosatti <hidden> · 2015-03-05
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Sebastian Andrzej Siewior <bigeasy@linutronix.de> · 2015-03-05
Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq · Sebastian Andrzej Siewior <bigeasy@linutronix.de> · 2015-03-06
Re: [patch -rt 0/2] use simple waitqueue for kvm vcpu waitqueue (v3) · Paolo Bonzini <pbonzini@redhat.com> · 2015-01-14

From: Christoph Hellwig <hch@infradead.org>
Date: 2015-08-07 16:41:41
Also in: kvm, lkml

On Fri, Aug 07, 2015 at 01:14:15PM +0200, Peter Zijlstra wrote:

On that, we cannot convert completions to swait. Because swait wake_all
must not happen from IRQ context, and complete_all() typically is used
from just that.

If swait queues aren't useable from IRQ context they will be fairly
useless.  What's the problem with making them irq safe?

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