Re: [PATCH] New 2.5.14 Hotplug CPU Work

From: Dipankar Sarma (
Date: Mon May 06 2002 - 14:38:29 EST

In article <> Rusty Russell wrote:
> Hi all,

> After some delay, a new scratch implementation of hotplug CPU
> for x86 is available:
> I'm pretty happy with the simpler boot code, but there are several
> problems with this version:

> 1) It needs synchronize_kernel to be 100% correct, which was broken by
> preempt.

Hi Rusty,

Here is a patch (rcu_poll) that supports synchronize_kernel() in
preemptible environment. This is a work in progress, there are
issues related to handling very long grace periods gracefully in
preemptible kernel that I am working on.


Dipankar Sarma  <>
Linux Technology Center, IBM Software Lab, Bangalore, India.

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