About interrupt handler
From: Dave Hylands <hidden>
Date: 2012-02-24 21:08:52
Hi Kosta, On Fri, Feb 24, 2012 at 1:19 AM, Kosta Zertsekel [off-list ref] wrote:
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I'm begin to learn the Kernel and i'm reading <<Linux kernel development>>.It says "This is an important point, always keep in mind that all interrupt handler has interrupted other code(possibly even another interrupt handler on a different line)".What i am not able to understand is how a interrupt handler be interrupted ? DID NOT it uninterrupted?It depends on the architecture and the interrupt controller being used, and the driver code itself. Normally, when an interrupt fires, that particular interrupt will be masked and your own handler won't interrupt itself, but you may very well be interrupted by other interrupts.Can you please point out some code for explanation?
Could you be a bit more specific about what example you're looking for? -- Dave Hylands Shuswap, BC, Canada http://www.davehylands.com