Messages in this thread | | | Date | Fri, 08 May 2009 11:19:12 +0300 | From | Avi Kivity <> | Subject | Re: [KVM PATCH v4 2/2] kvm: add support for irqfd via eventfd-notification interface |
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Davide Libenzi wrote: > 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? >
We are.
-- Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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