Groups > linux.kernel > #1202897

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

From	Christoph Hellwig <hch@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq
Date	2015-08-07 18:50 +0200
Message-ID	<pUT0d-5e5-1@gated-at.bofh.it> (permalink)
References	(5 earlier) <oUUrx-2C2-35@gated-at.bofh.it> <oVdu9-5W5-1@gated-at.bofh.it> <oXRnt-2Nq-33@gated-at.bofh.it> <pUNxw-5E5-31@gated-at.bofh.it> <pUNQS-6fD-19@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

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?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Thread

Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq Peter Zijlstra <peterz@infradead.org> - 2015-08-07 13:00 +0200
  Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq Peter Zijlstra <peterz@infradead.org> - 2015-08-07 13:20 +0200
    Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq Christoph Hellwig <hch@infradead.org> - 2015-08-07 18:50 +0200
      Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq Peter Zijlstra <peterz@infradead.org> - 2015-08-07 18:50 +0200
        Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq Christoph Hellwig <hch@infradead.org> - 2015-08-09 08:50 +0200
    Re: [patch -rt 1/2] KVM: use simple waitqueue for vcpu->wq Thomas Gleixner <tglx@linutronix.de> - 2015-08-17 22:40 +0200

csiph-web