linux-kernel - [PATCH 0/8] Make nmi_shootdown_cpus() usable by non-kdump code

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Message-Id: <1226496884-24628-1-git-send-email-ehabkost@redhat.com>
Date:	Wed, 12 Nov 2008 11:34:36 -0200
From:	Eduardo Habkost <ehabkost@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Avi Kivity <avi@...hat.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Simon Horman <horms@...ge.net.au>,
	Andrew Morton <akpm@...l.org>, Vivek Goyal <vgoyal@...hat.com>,
	Haren Myneni <hbabu@...ibm.com>,
	Andrey Borzenkov <arvidjaar@...l.ru>,
	"Rafael J. Wysocki" <rjw@...k.pl>, kexec@...ts.infradead.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Eduardo Habkost <ehabkost@...hat.com>
Subject: [PATCH 0/8] Make nmi_shootdown_cpus() usable by non-kdump code

Hi, Ingo,

As tip/master is a moving target, I am splitting the previous kdump/reboot
virtualization-disable code series[1] into smaller series so the simpler
parts can be included sooner. This first series is just for making
nmi_shootdown_cpus() usable by non-kdump code, by moving their generic
parts to reboot.c.

They are exactly the same patches I've sent as 01-08 in the previous
series.

The NMI IPIs method used by nmi_shootdown_cpus() is the only way
we can make sure VMX is disabled on all CPUs before rebooting, on
emergency_restart(), because CPUs may have IRQs disabled. That's why I
will reuse nmi_shootdown_cpus() for the emergency_restart code when
VMX is enabled.

The virtualization-specific parts should come soon, after I implement
the suggestions by Eric and Avi, by making the virtualization-disabling
functions inline so they can be used directly by the core code (instead
of using the function pointer tricks from my previous series).

[1] http://marc.info/?l=linux-kernel&m=122591590923455&w=2

-- 
Eduardo
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