svn commit: r211176 - in head/sys: amd64/amd64 i386/i386

[Kostik Belousov]

On Wed, Aug 11, 2010 at 10:51:27AM +0000, Attilio Rao wrote:
> Author: attilio
> Date: Wed Aug 11 10:51:27 2010
> New Revision: 211176
> URL: http://svn.freebsd.org/changeset/base/211176
> 
> Log:
>   IPI handlers may run generally with interrupts disabled because they
>   are served via an interrupt gate.
>   
>   However, that doesn't explicitly prevent preemption and thread
>   migration thus scheduler pinning may be necessary in some handlers.
>   Fix that.

How the preemption is supposed to happen ? Aside from the explicit
calls to mi_switch() from e.g. critical_exit().
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