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Date: Wed, 11 Aug 2010 13:57:39 +0300
From: Kostik Belousov <kostikbel@gmail.com>
To: Attilio Rao <attilio@freebsd.org>
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Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
	src-committers@freebsd.org
Subject: Re: svn commit: r211176 - in head/sys: amd64/amd64 i386/i386
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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
>=20
> Log:
>   IPI handlers may run generally with interrupts disabled because they
>   are served via an interrupt gate.
>  =20
>   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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