From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andrew Morton <akpm@osdl.org>,
suparna@in.ibm.com, fastboot@osdl.org,
Jesse Barnes <jbarnes@engr.sgi.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
mbligh@aracnet.com
Subject: Re: [Fastboot] Re: Announce: dumpfs v0.01 - common RAS output API
Date: Wed, 28 Jul 2004 23:53:13 +0100 [thread overview]
Message-ID: <1091055192.31923.1.camel@localhost.localdomain> (raw)
In-Reply-To: <m1pt6f681y.fsf@ebiederm.dsl.xmission.com>
On Iau, 2004-07-29 at 00:11, Eric W. Biederman wrote:
> If we can ensure the addresses where the new kernel will run will never
> have DMA pointed at them I actually don't think so. This is why last
> year I recommended building a kernel that runs at a non-default address
> and finding a way to simply preload it there.
We DMA into arbitary allocated pages anywhere in the memory space, so
you never know where is safe other than areas preallocated during the
old kernel run.
Since you can just clear the master bit on each PCI device it isnt a big
deal to protect against. (except a couple of devices that forget
to honour it)
next prev parent reply other threads:[~2004-07-28 23:56 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-22 16:19 Announce: dumpfs v0.01 - common RAS output API Keith Owens
2004-07-26 6:57 ` Andrew Morton
2004-07-28 1:53 ` Eric W. Biederman
2004-07-28 10:54 ` Suparna Bhattacharya
2004-07-28 10:46 ` [Fastboot] " Alan Cox
2004-07-28 14:38 ` Martin J. Bligh
2004-07-28 14:06 ` Alan Cox
2004-07-28 15:21 ` Martin J. Bligh
2004-07-28 15:56 ` Eric W. Biederman
2004-07-28 17:09 ` Andrea Arcangeli
2004-07-28 16:05 ` Eric W. Biederman
2004-07-28 15:42 ` Eric W. Biederman
2004-07-28 15:12 ` Eric W. Biederman
2004-07-28 15:23 ` Martin J. Bligh
2004-07-28 15:53 ` Eric W. Biederman
2004-07-28 16:03 ` Jesse Barnes
2004-07-28 18:00 ` Eric W. Biederman
2004-07-28 18:06 ` Jesse Barnes
2004-07-28 19:42 ` Martin J. Bligh
2004-07-28 19:56 ` [Fastboot] " Alan Cox
2004-07-28 19:44 ` Andrew Morton
2004-07-28 23:11 ` [Fastboot] " Eric W. Biederman
2004-07-28 22:53 ` Alan Cox [this message]
2004-07-29 1:12 ` Eric W. Biederman
2004-07-29 14:00 ` Alan Cox
2004-07-29 15:47 ` Eric W. Biederman
2004-07-28 18:21 ` Alan Cox
2004-07-28 19:23 ` Martin J. Bligh
2004-07-28 20:28 ` [Fastboot] " Eric W. Biederman
2004-07-28 20:33 ` Andrew Morton
2004-07-28 19:59 ` Alan Cox
2004-07-28 22:42 ` Andrew Morton
2004-07-28 22:44 ` Jesse Barnes
2004-07-28 23:17 ` Eric W. Biederman
2004-07-28 22:55 ` Alan Cox
2004-07-29 0:22 ` Andrew Morton
2004-07-29 13:57 ` Alan Cox
2004-07-29 18:17 ` Andrew Morton
2004-07-29 21:20 ` Alan Cox
2004-07-29 22:30 ` Gerrit Huizenga
2004-07-30 0:04 ` Eric W. Biederman
2004-07-29 23:25 ` Alan Cox
2004-07-30 4:07 ` Eric W. Biederman
2004-07-30 12:38 ` Gerrit Huizenga
2004-07-31 13:52 ` Matthias Urlichs
2004-07-30 15:24 ` Olivier Galibert
2004-07-29 1:05 ` Eric W. Biederman
2004-07-29 14:12 ` Martin J. Bligh
2004-07-28 23:44 ` Andrew Morton
2004-07-29 0:58 ` Eric W. Biederman
2004-07-29 1:09 ` Andrew Morton
2004-07-29 1:56 ` Eric W. Biederman
2004-07-29 14:18 ` Martin J. Bligh
2004-07-29 16:01 ` Eric W. Biederman
2004-07-29 16:19 ` Eric W. Biederman
2004-07-29 14:08 ` Martin J. Bligh
2004-07-29 15:52 ` Eric W. Biederman
2004-07-29 16:13 ` Martin J. Bligh
2004-07-29 17:12 ` Matthias Urlichs
-- strict thread matches above, loose matches on Subject: below --
2004-07-30 15:02 Manfred Spraul
2004-07-30 14:42 ` Alan Cox
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