From: ebiederm@xmission.com (Eric W. Biederman)
To: David Woodhouse <dwmw2@infradead.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>,
Neil Horman <nhorman@redhat.com>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
Simon Horman <horms@verge.net.au>,
Andrew Vasquez <andrew.vasquez@qlogic.com>,
"H. Peter Anvin" <hpa@zytor.com>,
linux-driver@qlogic.com, Vivek Goyal <vgoyal@redhat.com>
Subject: Re: In place kexec
Date: Fri, 30 Jul 2010 11:21:42 -0700 [thread overview]
Message-ID: <m1vd7w3k5l.fsf@fess.ebiederm.org> (raw)
In-Reply-To: <1280508817.28006.0.camel@macbook.infradead.org> (David Woodhouse's message of "Fri\, 30 Jul 2010 18\:53\:37 +0200")
David Woodhouse <dwmw2@infradead.org> writes:
> On Thu, 2010-07-29 at 21:41 -0700, Eric W. Biederman wrote:
>> There isn't a bus master shut off at the core level.
>
> Effectively, there is if you have an IOMMU.
Depends on the IOMMU. There are several dinky IOMMUs that when you
shut them off DMA simply goes around them, and is not stopped.
Eric
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next prev parent reply other threads:[~2010-07-30 18:22 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-28 21:57 In place kexec H. Peter Anvin
2010-07-28 22:02 ` Eric W. Biederman
2010-07-29 13:43 ` Neil Horman
2010-07-29 15:03 ` H. Peter Anvin
2010-07-29 15:06 ` Neil Horman
2010-07-29 17:51 ` H. Peter Anvin
2010-07-29 18:06 ` Eric W. Biederman
2010-07-29 18:29 ` H. Peter Anvin
2010-07-29 19:16 ` Vivek Goyal
2010-07-29 19:51 ` Eric W. Biederman
2010-07-29 19:55 ` Randy Dunlap
2010-07-30 3:38 ` H. Peter Anvin
2010-07-30 4:41 ` Eric W. Biederman
2010-07-30 5:04 ` H. Peter Anvin
2010-07-30 16:30 ` Eric W. Biederman
2010-07-30 16:41 ` H. Peter Anvin
2010-07-30 18:36 ` Eric W. Biederman
2010-07-30 22:52 ` Andrew Vasquez
2010-07-30 23:25 ` H. Peter Anvin
2010-07-30 23:40 ` Eric W. Biederman
2010-07-30 16:53 ` David Woodhouse
2010-07-30 18:21 ` Eric W. Biederman [this message]
2010-07-30 18:34 ` Vivek Goyal
2010-07-30 18:50 ` David Woodhouse
2010-07-30 18:56 ` Vivek Goyal
2010-07-30 19:17 ` David Woodhouse
2010-07-30 19:39 ` Eric W. Biederman
2010-07-30 19:46 ` David Woodhouse
2010-07-30 20:08 ` Eric W. Biederman
2010-07-30 20:15 ` David Woodhouse
2010-07-30 21:11 ` H. Peter Anvin
2010-07-30 20:42 ` H. Peter Anvin
2010-07-30 21:18 ` Khalid Aziz
2010-07-30 21:44 ` Khalid Aziz
[not found] ` <20120425211512.GA8583@ldl.usa.hp.com>
2012-04-25 22:06 ` Vivek Goyal
2010-07-29 20:06 ` H. Peter Anvin
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