From: "H. Peter Anvin" <hpa@zytor.com>
To: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Neil Horman <nhorman@redhat.com>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
Simon Horman <horms@verge.net.au>,
"Eric W. Biederman" <ebiederm@xmission.com>,
linux-driver@qlogic.com, Vivek Goyal <vgoyal@redhat.com>,
Andrew Vasquez <andrew.vasquez@qlogic.com>
Subject: Re: In place kexec
Date: Thu, 29 Jul 2010 20:38:28 -0700 [thread overview]
Message-ID: <4C524934.5070806@zytor.com> (raw)
In-Reply-To: <20100729125535.85dfd7da.randy.dunlap@oracle.com>
On 07/29/2010 12:55 PM, Randy Dunlap wrote:
>>
>> And device_shutdown calls every drivers .shutdown method.
>>
>> Things like this are always a driver problem.
>
> so is there a default .shutdown method for drivers that do not specify one?
>
> like the qla2xxx driver does not.
>
If it doesn't, even if bus mastering gets shut off at the core level,
there is a risk that is clobbers data when it turns it back on if the
initialization sequence is problematic.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
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next prev parent reply other threads:[~2010-07-30 3:38 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 [this message]
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
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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