Re: [PATCH] Allow preemption during lazy mmu updates

From: Avi Kivity
Date: Sun Apr 19 2009 - 06:18:47 EST


Peter Zijlstra wrote:
On Wed, 2009-04-08 at 16:54 +0200, Ingo Molnar wrote:
kernel/sched.c | 2 -
Needs the ack of ... oh, never mind - this one is fine i guess ;-)

Ah, about that. This new preemption hook has slightly different
requirements than the current preempt-notifiers have (hence the new
hook), I was wondering if KVM (afaik currently the only preempt-notifier
consumer) could live with these requirements.

That is, could these be merged?

What are the slight differences in requirements?

KVM wants to run in non-preemptible, interrupts-enabled context.


--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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