Question about L4/Fiasco running the kernel with interrupts disable

Adam Lackorzynski adam at
Thu Apr 9 00:02:08 CEST 2015

On Wed Apr 08, 2015 at 14:10:44 +0800, deng.chao1 at wrote:
> Hi all,
> I have read the wikipedia website of L4 kernel(, it says that  L4/Fiasco was designed "fully preemptible to achieve a low interrupt latency " at first, however "the complexities of a fully preemptible design resulted in later versions of Fiasco to return to the traditional L4 approach of running the kernel with interrupts disabled ".
> I am very interested in the kernel's interrupt latency. I have check the latest versions of Fiasco kernel in running, and it keeps interrupts disabled indeed.
> So I wonder whether there was any early version of L4/Fiasco which supported fully preemptible?
> Or was there any article talked about this ?

You, and your colleage, should look at this dissertation:

Adam                 adam at

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