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Date: Thu, 7 May 2009 20:13:49 -0700 (PDT) From: Davide Libenzi <davidel@...ilserver.org> To: Avi Kivity <avi@...hat.com> cc: Gregory Haskins <ghaskins@...ell.com>, viro@...IV.linux.org.uk, kvm@...r.kernel.org, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [KVM PATCH v4 2/2] kvm: add support for irqfd via eventfd-notification interface On Thu, 7 May 2009, Avi Kivity wrote: > What's your take on adding irq context safe callbacks to irqfd? > > To give some background here, we would like to use eventfd as a generic > connector between components, so the components do not know about each other. > So far eventfd successfully abstracts among components in the same process, in > different processes, and in the kernel. > > eventfd_signal() can be safely called from irq context, and will wake up a > waiting task. But in some cases, if the consumer is in the kernel, it may be > able to consume the event from irq context, saving a context switch. > > So, will you consider patches adding this capability to eventfd? Since I received this one after your ACK on the capability of eventfd of triggering callbacks, I assume we're clear on this point, aren't we? - Davide -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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