linux-kernel - Best method for sending messages to user space?

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Message-ID: <48FE1741.1000502@freescale.com>
Date:	Tue, 21 Oct 2008 12:54:09 -0500
From:	Timur Tabi <timur@...escale.com>
To:	linux-kernel@...r.kernel.org, Kumar Gala <kumar.gala@...escale.com>
Subject: Best method for sending messages to user space?

I have a driver that provides services for a hypervisor that my company is
creating.  The hypervisor can send notifications to the driver via interrupts.
I want to send a message to user space whenever the driver receives one of the
interrupts.  The messages don't have any payload.

Should I be creating kobjects and using kobject_uevent(..., KOBJ_CHANGE) to send
these messages?  I want to take advantage of the standard (hotplug?) user-space
interface for this sort of thing, so that I don't need to have a custom-written
daemon running that waits on blocking ioctl calls.

-- 
Timur Tabi
Linux kernel developer at Freescale
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